What would you like to edit?

Alternative Titles

Japanese: グレイプニル
English: Gleipnir
German: Glepnir
More titles


Type: TV
Episodes: 13
Status: Finished Airing
Aired: Apr 5, 2020 to Jun 28, 2020
Premiered: Spring 2020
Broadcast: Sundays at 23:30 (JST)
Licensors: Funimation
Studios: PINE JAM
Source: Manga
Genres: ActionAction, MysteryMystery, SupernaturalSupernatural, EcchiEcchi
Demographic: SeinenSeinen
Duration: 23 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 6.981 (scored by 225336225,336 users)
1 indicates a weighted score.
Ranked: #42602
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #454
Members: 483,570
Favorites: 1,933

Available At


Streaming Platforms

May be unavailable in your region.
Ranked #4260Popularity #454Members 483,570
Add to My List
Episodes: /13


Shuuichi Kagaya is what one would consider an average high school student, but sometimes, he turns into a monster. He doesn't know how or why he got his abilities, only that he would prefer no one knows about them. One night, he finds a building ablaze with a girl trapped inside. Deciding to save her, he transforms and carries her to safety, but accidentally drops his phone.

The next day, the girl he saved—Claire Aoki—finds him and confronts him about his monster identity. She even goes so far as to push him off the school roof to prove her theory after Shuuichi denies her allegations. Desperate to save himself, he transforms, and Claire snaps a picture in order to blackmail him into telling her everything he knows about monsters, which, ironically, isn't much.

As it turns out, Claire has a secret of her own: she has been searching for her sister, who also became a monster. She enlists Shuuichi's help to track her down, but they aren't the only ones searching for answers.

[Written by MAL Rewrite]


No background information has been added to this title. Help improve our database by adding background information here.

Episode Videos

Related Anime

Characters & Voice Actors

Mifune, Nana

Itou, Miku

Sanbe, Tadanori

Yasumoto, Hiroki


Ishigami, Shizuka

Koyanagi, Sayaka

Itou, Shizuka


Taichi, You



Opening Theme

Apple Music
Amazon Music
Youtube Music
"Altern-ate-" by H-el-ical//


Dec 26, 2023
"Gleipnir" is an anime that proves to be better than what it initially sets out to be and stands out significantly, even with excessive ecchi (personally, I'm not a fan). What seemed to be "just" a story of a protagonist who transforms into a monster and teams up with a classmate, under blackmail, to learn more about these "monsters," reveals immense depth in its plot.

As the episodes unfold, we witness the deepening of each character, including some that are not so central, demonstrating careful storytelling. A perfect example of this is the "monster" that appears at the end of the first episode and confronts Clair ...
Oct 30, 2023
Mixed Feelings
I would say its pretty good compared to what other people say however, it can easily fall flat on its face if the next season doesn't do a good a job finishing the story. I feel like a lot of people don't like it because its slow, not to the point, and is more of a weird teen mystery story before anything else. It has weird sexual themes that honestly take a back seat real fast or i just stopped noticing it because it doesn't really matter by the end.

The story feels very muddy but it has its moments and I want to know more. ...
Dec 4, 2021
This had so much potential to be a very good anime and when I say that I mean it, think of how good Parasyte was, this could have been at the tier, but of course, the main character is too wimpy for that. Do you love wimpy shrimp main characters or, aka the Shinji syndrome, do you love a show that keeps on making you question every decision? Then “oh boy, do I have a show for you”. I can see why some people liked this, but after finishing it, I have a lot more dissatisfaction than anything. Have you ever wanted to like ...

Interest Stacks

19 Entries · 53 Restacks
26 Entries · 4 Restacks


Recent News

North American Anime & Manga Releases for July

North American Anime & Manga Releases for July

Here are the North American anime, manga, and light novel releases for July Week 1: July 6 - 12 Anime Releases All Out!! Complete Collection Blu-ray [Essentials] more

Spring 2020 Simulcast List [Update 4/28]

Spring 2020 Simulcast List [Update 4/28]

In this thread, you'll find a comprehensive list of anime acquired for simulcast release during the Spring 2020 season. Anime series licensed for home video more

Recent Forum Discussion

Poll: Gleipnir Episode 13 Discussion ( 1 2 3 4 )
KANLen09 - Jun 28, 2020
196 repliesby joeladonys »»
Jan 22, 10:51 AM
Poll: Gleipnir Episode 10 Discussion ( 1 2 )
Stark700 - Jun 7, 2020
94 repliesby sapphiron22 »»
Dec 11, 2023 11:15 PM
Poll: Gleipnir Episode 12 Discussion ( 1 2 3 )
KANLen09 - Jun 21, 2020
142 repliesby WELLERM »»
Dec 4, 2023 7:14 AM
Poll: Gleipnir Episode 11 Discussion ( 1 2 )
Stark700 - Jun 14, 2020
90 repliesby WELLERM »»
Dec 4, 2023 7:13 AM
Poll: Gleipnir Episode 9 Discussion ( 1 2 )
Stark700 - May 31, 2020
73 repliesby WELLERM »»
Dec 4, 2023 7:11 AM

Recent Featured Articles

In Numbers: Spring 2020 Premiere Rankings

In Numbers: Spring 2020 Premiere Rankings

The season is now fully underway, but which shows took off running and which tripped at the starting line?

by Shymander