Shounen Sirius

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Shounen Sirius (111)
After being killed by a passing robber, a normal 37-year-old guy finds himself reincarnated in another world as a blind slime with unique abilities. He takes up a new name and calls himself "Rimuru Tempest," which he thought of after meeting his new friend, "catastrophe-level" Storm Dragon Verudora. There, he begins his new slime-like life in another world with his increasing number of minions by his side. (Source: Guro Translation, edited)

Serialization:
Shounen Sirius

Mar 26, 2015
25,335 8.34
One day, Yasuke was working up the courage to confess his feelings for his childhood friend Akari. It was the perfect opportunity, since the two of them were going to eat dinner alone together at his family's shrine. Before dinner, he rushes through the daily shrine rituals and accidentally breaks a sacred mirror. A goddess, who looks like a cute girl, curses him for it, and now he will die if he's ever separated from her. All too late, he learns that she's a goddess of misfortune, and horrible things happen around her whenever she's upset. Will he be able to get the goddess to lift the curse? And how will he ever explain this to Akari? (Source: MangaHelpers)

Serialization:
Shounen Sirius

Feb 26, 2011
23,771 7.51
A baby is found crying in a mass of Titan vomit, amidst the dead titan flames. The child is called "child of titan" and is essentially hated by the people inside the walls. He also seems to grow unnaturally fast. Named Kuklo, he parts himself from his past/upbringing and gambles on the fate of humanity by enlisting in the scouting legion. (Source: MangaHelpers)

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Shounen Sirius

Sep 26, 2013
19,218 7.50
Werewolves, demons, monsters, vampires. All these ferocious creatures are afraid of the same thing: the beautiful Princess Hime, an awesome warrior who fights off the forces off evil with a chainsaw and a smile. Not only does she look great in a tiara, she has magical powers that allow her to raise the dead. She's a girl on a mission, and with the help of her undead servant and a supercute robot, there's no creature of darkness she can't take down! (Source: Del Rey)

Serialization:
Shounen Sirius

Jun 25, 2005
10,518 7.59
The story revolves around four teenagers; Akina, Hime, Ao, and Kotoha; each of them having their own unique abilities. They run an office called Hiizumi Life Counseling Office, where their job is to help and protect the townspeople of Sakurashin, a town where humans and youkai co-exist. The town is protected by a barrier created by the spiritual sakura known as The Seven Pillars. The Seven Pillars exist in both the human world and the youkai world and is the only thing that keeps both worlds connected to each other. However, recent bizarre incidents have occurred in their town and someone has threatened its safety. It is up to the four of them to protect the town they love. (Source: Wikipedia)

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Shounen Sirius

Jan 26, 2006
8,739 7.67
Everyone on the Clockwork Planet considers Naoto Miura a machinery nut. Every moment of every day, he has his mind on gears and his hands tinkering with delicate mechanical motors. But nobody understands how he can hear and feel gears in operation, even from a long distance away. Then one day, a clockwork maiden falls from the sky, presaging events that would shake the whole world... (Source: MU)

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Shounen Sirius

Sep 26, 2013
7,077 7.65
For generations the Turkiye Devleti and the Balt-Rhein Empire have stood in stern opposition to each other. Then one night, when an imperial minister is found assassinated, the two nations are plunged into a potentially explosive situation. As the generals of Turkiye's council cry for war, Mahmut comes to discover the devious truth behind the assassination. Thus the young pasha's battle for his country, peace, and trust in his fellow man begins! (Source: Kodansha) Included one-shot: Volume 4: Anastasia no Shinei Taichou (Anastasia's Captain of the Guard)

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Shounen Sirius

Jul 26, 2007
6,705 8.15
This story takes place during the civil war in Japan. There is a mysterious boy with a short horn on his forehead. His life turns upside down after he saves wanted female ninja, who then tells him that she's his servant and he's an emperor. Soon a few more girls appear in his life and the adventure begins. What will happen to him and what kind of weird and wonderful stories lie in front of the small group is for you to find out. (Source: MU)

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Shounen Sirius

Aug 26, 2005
6,260 7.41
Within the human body there is said to be approximately 60 million cells. White blood cells, red blood cells, platelets, macrophages, memory cells, killer T cells, natural killer cells, B cells, mast cells and many more! All these different cells work tirelessly within the body, never resting for a moment, at any time willing to resist invading foreign entities like germs and viruses to the bitter end! From Akane Shimizu, winner of Shounen Sirius' Rookie of the Year Award, comes an informative tale about anthropomorphised cells!

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Shounen Sirius

Jan 26, 2015
6,152 8.01
Four years ago, a large scale disaster in Tokyo claimed two million lives. The remaining thirteen districts of the city were isolated into the Tokyo Barricade Zone. Morisaki Harumi, an unruly kid with great fighting strength, is his family's sole survivor from the incident. One day, in a traffic accident, Haru gets pulled into a world of violence and meets Mana, the girl who turned herself into an ancient sword. (Source: Mangaupdates)

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Shounen Sirius

Nov 25, 2006
4,991 7.25
Look for him in the boulevard full of sorrow and desires called Slum Street and there is where you shall find the Necromancer. He has the power and knowledge to resurrect all your loved ones and the only thing you have to do is make a contract with him while you’ll find yourself being swiped away by a tale of life and death. (Source: Easy Going Scans)

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Shounen Sirius

Mar 26, 2009
4,625 7.65
The Kirionira are the demons that live in another dimension and invade the human world through their dreams. The only defense humanity has against the demonic assault are the hunters who rely on their sex drive as a source of power to fight against them. Riku Yoichi came from a long line of hunters and had high amounts of sexual energy which allowed him to be a great hunter. He moved away from his home town after middle school to demolish the Kirionira and was successful in finishing off the king and ending the battle forever. However, the peace came at the price of Yoichi losing his sex mojo. Returning back to his home town, he soon learns that the demon invasion was not over, but without his sex drive, he is helpless to fight back. He tries convincing his childhood friend Namba Midori and her female classmates to get him sexually aroused, but they want nothing to do with it. (Source: MangaHelpers)

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Shounen Sirius

Dec 26, 2011
4,611 6.23
Kirika Hijiribashi is the Executive Committee Treasurer managing a high school Student Council budget of 800 million yen. She is also the only committee member with an additional title: Student Council Detective able to sniff out amazing solutions to bizarre cases. Hikage Makimura, who recently transferred into the high school, finds himself not only tricked into joining the Student Council, but is now assigned as her assistant. (Source: MU)

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Shounen Sirius

Apr 26, 2012
3,453 7.27
The Comp is a popular portable game system that also functions as a smartphone. But it suddenly becomes a portal for demons to travel to the human world! Kazuya receives three Comps, from his master programmer cousin Naoya, for himself and his two friends Atsuro and Yuzu. In order to survive the demon invasion, the trio have to use the Comps to summon and subdue the demon that appears in order to fight back against the waves of demons that are about to swarm Japan! (Source: MangaHelpers)

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Shounen Sirius

May 26, 2012
3,401 7.47
Inaba Yuushi's parents died in his first year of middle school, so he moved in with his relatives. Though they did care for him, he could tell he was a burden and happily prepared to move to a high school with a dormitory. Unfortunately, the dormitory burned down before he could move in! Yuushi doesn't want to live with his relatives anymore, but it's rough finding lodging as an orphaned student with little money. He finally finds a room in a nice old building which seems too good to be true. The catch is that it is a Monster House, a place where humans and supernatural creatures—ghosts, mononoke, etc.—live together. Another high schooler lives there, a cute girl named Akine, and she's completely unfazed by the monsters. In fact, she can even exorcise evil spirits! Yuushi's high school life just got much stranger than he ever bargained for! (Source: MangaHelpers)

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Shounen Sirius

May 26, 2011
2,656 7.65
A world where humans are invaded by the existence called Yuugenshu. People were able to survive because of the floating continent, Obie Crea, protected by Priestesses' prayers. Sheltis had once aimed to become a Sen'nenshi—a partner of Yumii, his childhood friend and also a Priestess. However, because he fell from the continent to the Eden "Garden of Corrupted Song," he harbored Mateki, what only Yuugenshu have, inside his body, and was exiled from Sophia "Tenketsu Palace" where Yumii lives. Meanwhile, Yumii was hoping for Sheltis to become her Sen'nenshi, but because he fell to the Eden "Garden of Corrupted Song," her wish is still unfulfilled. (Source: MU)

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Shounen Sirius

Jun 26, 2012
2,392 7.29
A watch that controls time, a marble that can find items and a stick of chalk that can kill any human... The items of the mysterious girl, List of the antiques, all hold their unique magical powers. Without our noticing, they slowly merge into our daily lives. If you strain your hearing you might discover the mysterious secrets hidden throughout the world. The curtain of this antiques fairy tale finally rises! (Source: Easy Going Scans)

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Shounen Sirius

Jan 26, 2011
2,212 7.31
When Ryuusuke Nanri changes schools after his parents' divorce, he is made to sit in front of a strange girl called Miya Fujimoto. Miya always wears Gothic Lolita-like fashion, carries a strange book and her cat Judah around with her and claims to be a witch. From now on, Ryuusuke will become the main target for all her strange witch experiments... (Source: MangaHelpers)

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Shounen Sirius

Aug 26, 2008
1,979 7.09
Ten years ago, a terrible virus swept the globe. It turned its victims into bloodthirsty monsters called Dracules, and the only cure is death. Now, with humankind on the brink of extinction, only the elite warriors of the Vius Squad stand between chaos and civilization. New recruit Leila Mikami is one of the squad's most promising young warriors, but she has another agenda: Her parents were killed by a Dracule, and she's determined to take revenge. To do this, she has to find the Dragon Eye - a magic weapon that will make her the most powerful warrior in the world. (Source: Del Rey) This series is on hiatus.

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Shounen Sirius

May 26, 2005
1,953 7.79
The 200,000 KM diameter artificial celestial body of APOSIMZ. Most of its volume is its core space, which is covered by a superstructural shell. Fifty centuries ago, the people who lost a war against the core lost their right to reside legitimately in APOSIMZ, and were left behind on the extremely cold surface. They face the spreading Frame disease. And aggressive automatons which appear frequently on the ruins level. Yet even so, somehow people survive. (Source: Comixology)

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Shounen Sirius

Feb 25, 2017
1,892 7.23
Shibaki is a high school boy only interested in girls. However, he has been branded as the most perverted boy at school, and the girls go out of their way to avoid him. When he finds a book in the library about how to summon witches, he tries it as a joke; unexpectedly, though, the book works, and a cute witch named Rurumo appears to grant him a wish. Shibaki helps Rurumo and she in return refuses to take his soul. After some time, he thinks about his meeting with Rurumo, and wishes he could see her again. His wish is granted immediately, as Rurumo falls from the sky and crash-lands in front of him, tasked with getting him to use up 666 magic tickets that grant wishes before she can become a witch again. However, according to Rurumo's familiar, what she does not know is that each ticket he uses will shorten his life span, and, when the last ticket is used, he will die. (Source: jCafe24)

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Shounen Sirius

May 26, 2007
1,387 7.08
Japan is being invaded by parasitic gods. The only one left to stop them is Nakua, the spider god. She enlists the help of Kanda Tarou, an otherwise normal boy who has the Nakua's spider familiar, Taroumaru, resting inside him. Together they free Japan's gods from the control of the parasites. (Source: Dan of Population GO)

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Shounen Sirius

Feb 25, 2012
1,328 7.10
In the year 1800 B.C. there was an ancient city called Babilim, a very important trade center, and this is where a teenage boy named Namuru lives and attends school. Namuru is instantly attracted to the mysterious new girl in school, Shaz, and she later gets them in trouble with some street thugs when she steals from a merchant. However, Shaz removes the head of the attacker without killing him and scares the thugs away. She explains to the confused Namuru that she possesses 1/50th blood of Marduke, the city of Babilim's God of War, and that he does as well. With the blood of a god within him, she explains that they can tap into a small part of the almighty power to manipulate dimensions which in turn allows them to remove and transport objects (explaining the "beheading" of the street thug). What's even more shocking is that Shaz wants Namuru to help her take over Babilim in order to destroy the kingdom! (Source: MangaHelpers)

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Shounen Sirius

Oct 26, 2009
1,207 6.41
The importance of "family" is being forgotten. At an all-girls school, a program to simulate and nurture family ties is carried out. Each student plays the role of father, mother, or child at random. Ayagasaki Kasuga is a girl who has been assigned the role of father in this outrageous project. (Source: MU)

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Shounen Sirius

Sep 26, 2013
1,167 7.42
Karugasaki Tora decided to repeat a grade and turn into a delinquent just so he could be popular, on his best friends advice. However, his plan backfired and nobody talks to him in his new classroom. The only thing he can look forward to is seeing the cute girl sitting next to him, but after trying to talk to her she immediately kicked him and threw him out the window. Later the same day, though, he saved her and a little girl from being hit by a truck. No longer able to avoid him, the girl reveals that she's a ghost playing a shinigami's game. She must get the boy she likes to return her feelings at times given by a pair of hourglasses so she can return to life, or fail and be sent to hell together. Unfortunately, her feelings have awakened for Karugasaki... (Source: MU) This series is on hiatus.

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Shounen Sirius

Aug 26, 2010
1,122 7.17
On the day he turns fourteen, Akira discovers his destiny: He’s a shiki tsukai, a warrior with the magical power to control the seasons. He also meets the beautiful Koyomi, another warrior, who is sworn to protect him. For there are evil forces intent on destroying Akira–and the entire universe! (Source: Del Rey)

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Shounen Sirius

Jul 26, 2005
1,038 7.06
The story, also adapted into a live-action film, is told from the point of view of 14-year-old Eriko, who is left in charge of her younger brother Daigo, when her parents disappear. Contrary to most manga, in Route 225, the disappearing parents are a major part of the plot. Daigo and Eriko have somehow been transported to an alternate world, from which they are still somehow able to dial back cryptic messages to Earth mobile phones.

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Shounen Sirius

Jan 26, 2007
909 6.90
In the distant technological future, civilization has reached its ultimate Net-based form. An "infection" in the past caused the automated systems to spiral out of order, resulting in a multi-leveled city structure that replicates itself infinitely in all directions. Now humanity has lost access to the city's controls, and is hunted down and purged by the defense system known as the Safeguard. In a tiny corner of the city, a little enclave known as the Electro-Fishers is facing eventual extinction, trapped between the threat of the Safeguard and dwindling food supplies. A girl named Zuru goes on a journey to find food for her village, only to inadvertently cause doom when an observation tower senses her and summons a Safeguard pack to eliminate the threat. With her companions dead and all escape routes blocked, the only thing that can save her now is the sudden arrival of Killy the Wanderer, on his quest for the Net Terminal Genes, the key to restoring order to the world. (Source: Official site)

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Shounen Sirius

Apr 26, 2017
887 7.21
The manga adaptation of the RPG in the Persona series from ATLUS: Persona Q: Shadow of the Labyrinth. On the last day of the Yasogami High School culture festival, a mysterious bell rang... (Source: Crunchyroll)

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Shounen Sirius

Jan 26, 2015
874 7.48
Lewin Randit is a first-year student attending the Gaius School of Witchcraft and Wizardry—except that he shows no aptitude for magic. Currently in training as a Swordsman, Lewin is constantly picked on by classmates and teachers alike for his lack of talent. But one day in the library, Lewin makes a couple of friends from the Magic division, and for the first time ever there are people who actually enjoy his company. However, a visit to the Magic division's labs goes awry when Lewin and his new friends accidentally unleash an army of undead! Now a team of inexperienced first-year students must fend off a magical dilemma that even the school professors would have trouble with. (Source: ANN)

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Shounen Sirius

Mar 26, 2005
771 7.70
Alto, a 12-year-old kid, has arrived to Porto Grande, the largest city in the country. His dream is to fly an airplane which only women can pilot. In order to fly, he disguises his gender and age and enrolls himself in an all girl's school. What kind of a school life awaits him behind those closed doors? (Source: M-U)

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Shounen Sirius

?? ??, 2007
750 6.79
Fumizuki Mai just recently moved into town and is starting her new life at school. She soon realizes that the curriculum is really weird, consisting of body fitness classes, undressing classes and extreme combat training. Mai soon realizes that her school is really a location for girls to become the most incredible women on Earth. She meets four girls who are weird but nice in their own way but their craziness and the ridiculous classes just might make Mai go crazy. (Source: Batoto) Included one-shot: Volume 3: Seigi no Fukumen Muffler Justice

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Shounen Sirius

Dec 26, 2007
746 6.35
The "academy love suspense" story is about a "love harem game" set in a real academy that was promised to a boring boy. However, in this harem scenario, the heroines will start a bloody battle. (Source: ANN)

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Shounen Sirius

Nov 26, 2016
603 7.00
A timid boy named Zao Ci, which was accepted by Mateliya, a Demon as her "number 2". He was always called an idiot by Mateliya. He is so weak that he could not even pull the trigger of his gun. But, who actually knows that he had a special power within him, which only Mateliya can control. This begins the adventure of the contract of the boy and his master to save others.

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Shounen Sirius

Sep 25, 2010
587 7.01
After his mother's death, Miwatari Yuu returns from Tokyo to live with relatives in the city of his birth, Ousuku. Yuu is the latest of a line of Shinto priests that stretches back generations. After his arrival, he runs into a strange girl who seems to be searching for the Northern Lights. Yuu saw the Aurora as a child, though no one believed him, and his mother had told him it was the armor of the Valkyries traced across the sky. Yuu's destiny is interwoven with this mysterious girl and the aurora, and he will not be able to help being drawn into a battle that involves both gods and humans! (Source: MangaHelpers)

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Shounen Sirius

Jun 26, 2010
578 6.68
Kokuyo and Harika are a little unusual- and not just because they're sorcery students. They're Obsidians, wizards who must use enchanted swords to help them cast spells. Their fellow students think Obsidians are inferior to "normal" wizards. But Kokuyo and Harika have something that their cohorts don't: the power of friendship! (Source: Del Rey Manga)

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Shounen Sirius

Dec 22, 2005
563 6.95
Erin is a 10-year-old girl who lives with her mother in the Tai Koh Region. She has a big love for animals, especially the Touda, dragon-like creatures used in the war. Her mother Soyon was originally of the Mist People, an ancient clan whose members have green eyes. Because Erin's late father was the son of the chief of a village of Touda breeders, Erin and Soyon live there and Soyon is the head Touda doctor. But one night, the Kiba, the Duke's strongest Touda, mysteriously die, and Erin's life will be changed forever, involving her into the fate of the whole country. The series tells the story of Erin's life from childhood into adulthood. (Source: Wikipedia) Included one-shot: Volume 11: Ryokui no Hito

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Shounen Sirius

Oct 25, 2008
549 7.69
(No synopsis yet.)

Serialization:
Shounen Sirius

Jan 26, 2011
477 7.17
The story is set in a middle school in Shishibone city. Tomohiro Miyajima, the main character of the story, and his group of friends are busy studying for an exam. One day, in search for a thrilling mystery as well as easy money, they take several donation boxes and fabricate a curse to scare everyone: "Ohone-sama’s curse" after scrawling 骨 (bone) all over the chalkboards and spreading rumors of the curse, the donation boxes are quickly filled and the curse becomes a major legend of the school. Of course, only Tomohiro and his friends knew the curse was fake. It wasn’t possible for anything to happen. That is, until they receive a donation of 50,000 yen and a letter to go with it, reading: "Please curse Tanashi Miyoko." Immediately after that letter, bullying and crimes in the school escalated, strange incidents occur, and Tomohiro and his friends are left with a much bigger mystery than they wanted to have, that they are forced to investigate by themselves. What happened shouldn’t have happened. Those who are alive should not be alive, those who know what they know shouldn’t have been able to know, and familiar faces are hardly what they seem, but why? And how? (Source: MU)

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Shounen Sirius

?? ??, 2007
467 6.42
Set in the near future in Japan, year 2035. A major incident was known as "Burst" which was caused by researching artificial life. A certain AI called "Matter" has eroded the Kurobe Gorge. Entering the research city, which has been called as humanity's last hope, has been prohibited by the government. Two years later, Aiko Tachibana, a 15-year-old girl who lost her family from the incident, was told by a transfer student, Yuuya Kanzaki, the truth that Aiko didn't know regarding a secret hidden within her body. The key to solve the mystery is said to be in the Primary Point, the center of Burst. When a boy and a girl, who bears the future of humanity, meet, what will be the new truth? (Source: MAL News)

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Shounen Sirius

Nov 25, 2017
465 7.30
COFFEE, TEA, OR WAR? When the kingdom of Arbansbool is invaded, the prince escapes with a handful of his closest attendants. But these aren’t just any attendants. They’re all maids whose job is to pour tea, not raise an army and help the prince reclaim his throne. Now chief maid Cacao Sardonyx and her five colleagues must take up arms and save a kingdom in this skirt-slashing, tea-spilling epic! (Source: Del Rey)

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Shounen Sirius

Apr 26, 2007
455 6.95
Beyond the solar system, there is a small planet where a young boy named Robo lives. He hoped that his wish for a friend would come to pass with every day that goes by. One day a mysterious rabbit humanoid, Usakichi, falls from the sky. Usakichi is a fugitive on the run from the army and befriends Robo to get a spaceship. However, the army catches up with Usakichi. Wanting to protect his first friend, Robo uses the item that his late father forbade him to use. After saving his Usakichi, Robo finds out that this item has the power to destroy planets. The space road movie adventure starts. (Source: Sweet Indulgent)

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Shounen Sirius

May 26, 2005
441 7.25
Luca Athrason has been sentenced with 500 years of imprisonment – such is the price to pay for his sins. The only way for him to shorten his sentence is to accomplish his missions as the Church’s vanguard or as some might call it... The Church's Dog!

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Shounen Sirius

Feb 25, 2006
437 6.92
The manga takes place in a world where animals suddenly took on the appearances of human girls. The girls, including former sheep Yōko, gather at a research and training facility where they learn about humans. (Source: ANN)

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Shounen Sirius

Nov 26, 2015
411 7.09
A boy moves into an old apartment building in order to live on his own but is surprised to find a girl dressed in a maid outfit already there. This is the Zashiki Warashi of the room, whose fiery temper soon rears its head.

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Shounen Sirius

Apr 25, 2009
326 6.59
In this story, the world is in chaos, thanks to Washu. Now in order to save it, Tenchi Masaki must go undercover as a student teacher at an all-girls school. Unfortunately for him, trouble always comes his way as he has a hard time to deal with the hijinks of his new students.

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Shounen Sirius

Nov 26, 2014
302 6.68
(No synopsis yet.)

Serialization:
Shounen Sirius

Jul 25, 2015
298 7.33
Continues where first part ended.

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Shounen Sirius

Feb 26, 2011
297 7.44
Gimmy is just an ordinary teen living in a desert town when his younger twin brother and sister disappear. While searching for them, Gimmy comes face-to-face with a sassy deity, Sora, the rain goddess who provides water to the town. But another goddess, Ciel, wants Sora's sacred tree–so that she can control the rain! (Source: Del Rey)

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Shounen Sirius

Jun 26, 2006
292 7.03
Alma Tandoji lives a lonely life. One day, Ruri Alba, a girl accompanied by her butler and maids, visits him. Knowing the power of Sacred Seven is latent within Alma, she asks him to lend her his powers. However, he refuses and drives her away since he injured many with his unusual strength in the past. Meanwhile, a fiendish Dark Stone creature suddenly appears in this peaceful town in the Kanto region. Only Alma's power of Sacred Seven can fight against it. But Alma just lets his power run amuck and things begin to get worse. Ruri raised her gemstone in order to release his true abilities, My Soul I give to you. With Ruri's wishes engraved in it, will Alma be able to defeat the Dark Stone?

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Shounen Sirius

Jul 26, 2011
277 N/A
Natural selection has created a deadly new species known as "Eclipse," who are driven to eliminate humanity. A scientist called Kurusu Kenji headed an organization whose purpose was to fight these deadly creatures of bone. To this end, he created the "Osteon," Eclipse-like creatures that obey the commands of the human from whose DNA they are created. Now Kenji is gone, and his assistant Kidogawa Rokuko is attempting to recruit his estranged teenage son. Kurusu Akira wanted nothing to do with the father that he believed abandoned him, but attacks from Eclipse force him to accept his own Osteon from Rokuko. He slowly finds himself drawn into the organization, whose members expect him to take his father's place. Akira and his Osteon may have little interest in protecting humanity, but they are determined not to be beaten! (Source: MangaHelpers)

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Shounen Sirius

Nov 26, 2012
254 6.88
Touno Mariko started seeing ghosts on the day of her grandmother's funeral 5 years ago. During a visit to the graveyard, she accidently destroys a tombstone. In order to not get cursed, she has to back for it back and in order to due that, she starts working for the Soul Traveling Agency.

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Shounen Sirius

?? ??, ????
254 7.18
Manga sequel ("What if" story) of the 2006 film adaptation.

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Shounen Sirius

Mar 26, 2007
243 N/A
Kabayama Atsushi was a child prodigy, but now he's just a regular high school boy. One day, a mysterious man from another world named Trance appears before Atsuhi and asks for his cooperation. Apparently Atsuhi is the chosen person who can save the world—by sleeping with Trance's "sister," Tsubasa! Already confused and overwhelmed, Atsushi is also targeted by a woman with strange powers that seems to know Trance and is determined to kill Atsushi. Does the world's fate really depend upon Atsushi having sex with Tsubasa? (Source: shinkeikaku)

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Shounen Sirius

May 26, 2005
233 6.87
Rulia-nya!! is a 4-koma series about a foreign exchange student Rulia and her everyday life with her classmates. (Source: MU)

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Shounen Sirius

Jan ??, 2008
226 7.05
Kuryuuin Getsuka loves martial arts and she won a championship in middle school but her father forcibly stopped Getsuka from doing martial arts. She was brought back to a high class all-girls academy that she went to when she was in elementary school and it was where there isn't any martial arts club, so she started her own martial arts association. (Source: MU)

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Shounen Sirius

?? ??, 2010
223 7.09
After venturing into outerspace, humanity have built many planetary cities. Most of these cities were affiliated to the Interstellar Federation, and it became the biggest force in the galaxy. Therefore, people believed that the Age of the Federation would last long. However, the situation changes when a tribe called "Tytania" secedes from the Federation and receives the title of Lord from the Emperor of Vardhana. Tytania obtains a victory over the Federation, and they assert that the Empire cannot exist without them. Tytania puts most of the Federal Territories under its control, and they hold hegemony in the galaxy. Meanwhile, a war begins between Euria and Tytania over their respective rights and interest. From that moment on, the galaxy enters into a tempestuous period. (Source: Wikipedia)

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Shounen Sirius

Mar 26, 2008
194 N/A
Ran is a bright and energetic first-grader in junior high school who possesses supernatual abilities. Together with Midori (her friend who also has supernatural powers) and Rui, the threesome are constantly embroiled in mysterious circumstances. Ran is troubled by her powers because it seems to spark off the ill intentions of people in contact with her. However, with the support of her family and peers, Ran learns to deal with her 'other' side and accepts who she is. The threesome also learn how to team up as a whole and solve these mysterious events. (Source: ANN)

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Shounen Sirius

May 26, 2005
175 N/A
Youka is a young 13-year old boy. One day, his Uncle, Kakusei, has him follow in his steps of martial arts and has him study the art of Zenshinkyou. After being mistreated, Youka runs away Zenshinkyou. He stumbles on a Forbidden Tomb where he finds a beautiful young woman, by the name of Shouryuujo. After a short time, Youka is eventually accepted by Shouryuujo to study the techniques of the Koboha under her, and thus begins their adventure through martial arts and love. (Source: MU)

Serialization:
Shounen Sirius

?? ??, 2009
171 7.28
Standing at the crossroads of life; the important choices—"Flags." Hatate Souta, a young man who can see these flags, transferred to "Hatagaya School," a prestigious school in the metropolitan area. Not only does he meet beautiful girls in his busy school life, he even goes as far as living with them under the same roof! Surrounded by these flags, this enviable romantic comedy begins! (Source: MU)

Serialization:
Shounen Sirius

Apr 25, 2015
169 N/A
Eight years after the events of Macross F, a mysterious phenomenon known as the Var Syndrome is gradually consuming the galaxy. It's up to a new generation of highly capable Valkyrie pilots to deal with this universal menace. And if they didn't have enough on their plate already, the Aerial Knights Valkyrie fighter team from the Kingdom of Wind have come to challenge the Delta Squadron.

Serialization:
Shounen Sirius

Apr 26, 2016
166 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Apr 26, 2012
165 7.43
The curtain rises on an Oriental Reconquista spin-off of Katou Kotono's Shoukoku no Altair, set far to the east of Rumeliana is the once peaceful and beautiful island nation of Kusanagi, which has been annexed by the Cinili Empire and fallen into ruin. (Source: MU)

Serialization:
Shounen Sirius

Jan 26, 2016
147 N/A
Just when Yamamura Fuuta is looking forward to his last summer vacation as a grade-schooler, the self-proclaimed miraiya barges into his life and turns what should have been an idyllic vacation into a series of events shrouded in mystery and filled with spine-tingling encounters. Strange things begin to surface all around the skeptical and unwilling Fuuta. This is a manga adaptation of Hayamine Kaoru’s novel of the same name. Squeal, gasp, cringe, tremble, but don’t forget to peek between your fingers from time to time as mangaka Takemoto Itoe adroitly transports you to the quiet, fictitious, rural town of Kamikushichou, where the woods are brimming with life in the vibrant Japanese summer. (Source: etc)

Serialization:
Shounen Sirius

?? ??, 2006
136 7.09
Tsuji, a high school student whose sister was killed by a spirit several years before the beginning of the story, joins his school's Paranormal Research Club after hearing rumours of its president being a brilliant exorcist, hoping to gain the skills necessary to avenge his deceased sister. (Source: MU)

Serialization:
Shounen Sirius

Nov 25, 2006
133 N/A
A prologue side story manga of Rose Guns Days taking place in 1946 with Rose as the main character.

Serialization:
Shounen Sirius

Apr 26, 2013
105 N/A
Juju doesn’t remember anything – not even his name (it was the writing on his coffin) – and yes, he’s already dead. But he’s been revived and introduced to Liila – a girl with prehensile hair and his right hand has been replaced, so there must be an adventure ahead! (Source: NatsuYume ver. 1)

Serialization:
Shounen Sirius

?? ??, ????
103 N/A
This is a world where all witches were hunted. The witches who appeared several decades ago were the subject of heresy, an existence that brings harm to people, but there is a young boy who had doubts about such common sense, Hayato Arai. (Source: MU, edited)

Serialization:
Shounen Sirius

Nov 25, 2017
97 N/A
Navagraha: DefenD 9 Triggers is set in a world where nine people known as the "Kuyou" can summon the power of Buddha to become the strongest people in the world to fight evil. Akira and Sakuya, former Kuyou who lost their powers, live a life of regret. But when a threat arises, they stand up to fight for what is important to them. Now they must find a way to reclaim the power of Buddha, and stand against Vishuddha, which is searching for a hibutsu (hidden Buddhist image) in order to destroy the world. (Source: ANN)

Serialization:
Shounen Sirius

Aug 26, 2015
97 N/A
This manga is about Suzume, the only human in the demon world. He works as a journalist in the demon capital city, Ooedo.

Serialization:
Shounen Sirius

Oct 26, 2013
91 N/A
A spin-off of Hataraku Saibou that focuses on the idle daily lives of erythroblasts (immature red blood cells) who don't want to work. (Source: MU)

Serialization:
Shounen Sirius

Jul 26, 2017
87 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Feb 25, 2017
83 N/A
It's the year 2016 and the Australian city of Miliopolis has been overrun by gangs, violence and crime. To fight against this, the government created the MPB Task Force aka Cerebus. The agency recruited children that had physical disabilities and they were given prosthetic parts that helped them become human weapons. The elite members of Cerebus are teenage girls code named Suzutsuki, Kagerou, and Yugiri. They use advanced technology and combat capabilities to exterminate the diseases that have infested the city. (Source: Mangahelpers)

Serialization:
Shounen Sirius

Dec 26, 2009
73 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Dec 26, 2015
69 N/A
The manga centers on a man having love problems at work, when a girl appears before him who turns out to be his reincarnated mother. (Source: ANN)

Serialization:
Shounen Sirius

Dec 26, 2017
68 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Aug 26, 2014
65 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Oct 26, 2016
64 N/A
Mathematics are erased from Japan school curriculum. Then an organization appear to be the one to oppose that idea, called Black Triangle, threats the government that the organization will take over the country. To fight them, police forms a team, and among them there is a junior high school girl. (Source: MU)

Serialization:
Shounen Sirius

May 25, 2013
55 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Feb 26, 2016
52 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Nov 26, 2007
50 N/A
The game's story centers around a war between the kingdom of Ragnanival, led by the king Odin, and the realm of Ringford, led by the queen Elfaria. Their war has devastated the country of Valentine, of which only scattered ruins remain. The story is told from the perspective of five characters whose stories intertwine: Gwendolyn, valkyrie and younger daughter of Odin; Cornelius, prince of the neutral country of Titania; Mercedes, daughter of Elfaria and princess of Ringford; Oswald, a shadow knight and agent of Ringford; and Velvet, a survivor of Valentine's devastation.

Serialization:
Shounen Sirius

May 26, 2016
47 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Apr 26, 2014
43 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Jun 26, 2017
42 N/A
The upheaval resulted in the further weakening of central authority, and throughout Japan regional lords, or daimyo, rose to fill the vacuum. In the course of this power shift, well established clans such as the Takeda and the Imagawa, who had ruled under the authority of both the Kamakura and Muromachi bakufu, were able to expand their spheres of influence. There were many, however, whose positions eroded and were eventually usurped by more capable underlings. This phenomenon of social meritocracy, in which capable subordinates rejected the status quo and forcefully overthrew an emaciated aristocracy became known as gekokujō which literally means "the underling conquers the overlord." One of the earliest instances of this phenomenon was Hōjō Sōun, who rose from relatively humble origins and eventually seized power in Izu province in 1493. Building on the accomplishments of Sōun, the Late Hōjō clan remained a major power in the Kantō region until its subjugation by Toyotomi Hideyoshi late in the Sengoku period. Other notable examples include the supplanting of the Hosokawa clan by the Miyoshi, the Shiba clan by the Oda clan, and the Toki by the Saito. (Source: M-U)

Serialization:
Shounen Sirius

?? ??, ????
36 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Apr 26, 2017
35 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Feb 26, 2016
34 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

Jun 25, 2005
33 N/A
There is a library in the void between the Heavens and Outer Space. This library has all the knowledge and wisdom gathered throughout the entire universe that ever was or ever will be, which is why it's called the Eternal Library. In this library, there is a girl aiming to become the Moon Path Librarian "Velvet," and her other goal is to read the first book of all time. (Source: MU)

Serialization:
Shounen Sirius

May 26, 2009
31 N/A
The continuing adventures of the lovable but incompetent witch, Tsukune-chan.

Serialization:
Shounen Sirius

Jun 25, 2005
31 N/A
(No synopsis yet.)

Serialization:
Shounen Sirius

May 26, 2015
31 N/A