Both series feature Intersexuals as protagonists. I.S. is a heartwarming, true-to-life story and exposé about the lives of Intersexuals. After School Nightmare is less sensitive about Intersex issues, and uses it more of a plot device, albeit a brilliant one. Both series feature Intersex protagonists who struggle with their gender identity and romance, and both are worth the read.
Both stories revolves around the main lead trying to come to terms with his/her gender neutral body. However Houkago Hokenshitsu is darker & delves more into the psychological aspect of it as compared to Magnolia's light hearted theme of romance.
Both about someone who is neither boy nor girl; where upper half is male and lower half is a female. The characters are similar; both deciding which gender they want to be in the end and getting their preferences straight.
X-Day and After School Nightmare are both titles by the same author. Therefore, the art and "feel" is similar. The characters of both series are tragically drawn, conflicted with themselves, and interesting.
Both of these stories deal with psychological undertones. With After School Nightmare all of the characters have problems they have to deal with so they can "graduate" and they all have to do with some form of psychological problem. In Loveless you've got the main two characters who have both gone through abuse in some form or fashion and have to deal with how that has made them. Both stories also have definite love triangles and BL.
All in all anyone who likes Loveless will find After School Nightmare highly addicting.
Both take place in a dream, are somehow strange and a bit scary but also wonderful. I can't discribe it, but if you liked After School Nightmare, you will like Heart no Kuni no Alice and vice versa. I don't know if Alice's ending is as surprising as the ending of After School Nightmare, though.
After School Nightmare might not be similar to the Utena manga (which I disliked and barely read any of '^__^) but definitely to the anime (which I loved!). In both there's the concept of an alternate world within a school, in which characters do battle in order to attain a higher purpose (compare "graduating" in ASN to the goal of attaining the Rose Bride in Utena). There are also themes of gender in both, and imagery of knights in shining armour. There is the theme of world-destroying too.
Basically, I would love it (not going to happen, but...) if After School Nightmare had an anime adaptation with the same artstyle/direction/music style as Utena, ahah. I listened to the Utena soundtrack whilst I read ASN after I realized how similar they were.  read more
this manga is indescribably beautiful. I found myself really in love with Ichijo after I read this and I really understood him. several of my friends where completely thrown off when I recommended it and didn't take me seriously until they actually read it. It's a breathtaker, truely [:
In both manga, the main character is androgynous. Both stories involve the protagonist's journey to find their sexual orientation as well as their inner gender.
Kakumei no Hi is much less philosophical and much more light hearted while Houkago Hokenshitsu is dark and mysterious.
With an involved storyline and poignant characters as well as worlds, CLAMP would have been proud to have drawn Afterschool Nightmare (Houkago Hokenshitsu). Both encourage the reader to have a very long thought session with identity and the nature of humanity. The plot twist at the end doesn't disappoint.
The main character struggles to face their gender issues. While After School Nightmare is set in a completely different kind of world/genre, the similarities are in that the main character is forced to choose between a male or female love interest but cannot due to gender insecurities.
They are both shojo, both have very slow developing plots, and the ending of one reminded me of the other. Or, should I say, the underlying plots with their culminations reminded me of the other. That said, I prefer peter panda more, but that's just me YMMV :) enjoy :)
On the surface, these two seem as far off as two series can be but from the get go you'll notice how the big event that changes the protagonist's lives are similar in that they are absolutely vague, have little foreshadowing and seems to have rules that are randomly inserted.
Gantz is the more graphic series but as hard as it is to envision due to the artwork and the genre, After School Nightmare is actually the more violent series and a whole lot more important characters die in it.
In the end, it is best to treat this recommendation not as a "what do you want to read next" but as an introduction test for which one of this series gets you more interested as the pacing for these type of series can be very rough (if not boring by virtue of being laid out with too many generic cliches before you get to the good parts) but they contain enough out of nowhere events that they are worth checking out so it's best to find a series that will better ease you into the whole thing. The reason it doesn't work as anything other than an introduction recommendation is that it's similar in exactly the opposite way Alien is similar to Jaws. Both protagonist want to be heroes. Both are horny men that act like they have PMS. Both have nearly the same pacing. But despite all these, they are as aesthetically different as they come and chances are it's too easy to dismiss these two as similar. read more
It has the half guy half girl aspect that Boku no Futatsu no Tsubasa has but in a different way. It still has sci-fi in it (ASN has more in my opinion), the ending is better. Overall, ASN is just more with your time. Especially since their is more character development within the supporting characters.
The plots have nothing in common, but these two stories both have a mysterious air, both create so many questions, the pace is very similar in the two stories and they are just both unique with a more mature approach to story-telling and characters. Both have romance and supernatural aspect without it getting overbearing.
Both mangas have a darker sub-plot and unique, very interesting stories that have a touch of gothic, a touch of supernatural and some good art. Both are pretty different from what you'd normally read in manga, as they break away from stereotypes and really make you think in a new way
Again, two very different stories ASN is a drama, while NC is a comedy, but at the core, both describe a development of a characters seeking to come to terms with themselves and pressures/expectations that surround them
FB has more lightness and innocence, but both stories are beautiful and touching, somewhat mysterious with people forming a bond by sharing a secret and learning to find strength to overcome their nightmares.
Although both plots revolve around completely different things, they seem to have the same "feel" to them. Both mangas mainly focus on the psychological aspect of their characters.
If you liked After School Nightmare you'd probably like Flower of Evil.
When I started reading (and watching) Angel Beats, I immediately thought of "After School Nightmare". These series have a very similar setting, in which the characters are inside some kind of school that looks normal but is not. They have to fight, they have to find their "true self" and they disappear without anybody knowing what happens to them.
While Angel Beats has a lot of comedy, After School Nightmare has more suspense and dramatic moments as well as romance ... and in general ASN is one of the best mangas out there. Highly recommended.
Both have a main protagonist stuck on a strange high school where a teacher gives him "missions" to save someone. In ASN the protagonist enters a sort of another dimension that is like a DreamWorld to help other characters until they wake up and he has a time limit. In TG the protagonist does not enter the other Dimension but he also has a time limit to change events in this world so that the other world doesn't get unbalanced. ASN has a continuous plot while TG is more comedic, episodic and random.
Both stories look at the meaning of life and have characters choosing between male and female within them. Plus, both have a unique feel. They are both fantasy-like, with romance that's not over the top
Tough the stories are very different, they are both very deep, dark, unique, thrilling and excellent. Both have a set of really troubled students, finding ways to heal their psychological scars and coming to terms with who they are.
Both stories have characters struggling to heal psychological wounds. Both stories don't take gender roles for granted, both are thought-provoking and beautiful, they also challenge standard notions of set roles for people to play.
The two are by the same mangaka and have the same refreshing take on student life and relationships and popularity. The plot is unpredictable until the very end, and it just keeps you hooked. These two are just great