Kono Danshi, Sekka ni Nayandemasu.

This Boy Suffers From Crystallization

What would you like to edit?

Alternative Titles

Synonyms: Kono Danshi, Sekka ni Nayandemasu.
Japanese: この男子、石化に悩んでます。
English: This Boy Suffers From Crystallization
More titles


Type: OVA
Episodes: 1
Status: Finished Airing
Aired: Dec 3, 2014
Producers: None found, add some
Licensors: Kuma Holdings
Studios: CoMix Wave Films
Source: Original
Genres: Boys LoveBoys Love, DramaDrama
Theme: SchoolSchool
Duration: 27 min.
Rating: PG-13 - Teens 13 or older


Score: 6.791 (scored by 1166411,664 users)
1 indicates a weighted score.
Ranked: #51332
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #4473
Members: 24,593
Favorites: 47

Available At


Streaming Platforms

Ranked #5133Popularity #4473Members 24,593
Add to My List
Episodes: /1


Ayumu Tamari suffers from a condition known as "Crystallization Syndrome." In moments of high stress, parts of his body begin to crystallize and become extremely difficult to move. Unfortunately, Ayumu's severe social anxiety makes him completely unable to speak to anyone in his class, and ultimately causes him to crystallize so frequently that he has to repeat a year in high school.

Ayumu's only solace is his homeroom teacher, Kouya Onihara, whom he affectionately refers to as "Oni-chan Sensei." Kouya collects and studies crystals, and he finds Ayumu's crystalline body both beautiful and fascinating. With his stress from school compounded by the complexities of a forbidden student-teacher relationship, Ayumu struggles to find normalcy in his life while managing his emotions and trying to prevent complete crystallization.

[Written by MAL Rewrite]

Characters & Voice Actors


Masuda, Toshiki


Hamazoe, Shinya


Yamamoto, Soubi
Director, Script, Original Creator
Aoi, Shouta
Theme Song Lyrics, Theme Song Performance, Theme Song Composition
Lenti, Marissa
ADR Director


Opening Theme

Apple Music
Amazon Music
Youtube Music
No opening themes have been added to this title. Help improve our database by adding an opening theme here.

Ending Theme

"glitter wish" by Shouta Aoi

Episode Videos


Aug 16, 2022
Score: a big, fat, juicy, one out of ten.

This anime is extremely slow, like, grandma counting her dimes at the cash levels of slow. I also have a hard time even imagining that more than 1 in every 7 billion people have a crystal fetish, but here we are. I would only recommend this to someone who has already watched Sleeping With Hinako and wants a new terrible OVA to fall asleep to.

The not-so-beautiful bØys in this anime are just that, not beautiful. When you watch a yaoi, you want to see the handsome, succulent bØys in action, but they look like trash. The art ...
Jun 8, 2022
Mixed Feelings
(Contains spoilers for the ending, but not that much. It's probably nothing you wouldn't already be able to guess.)

It was a story that was enjoyable enough for a casual watch.

I don't like student-teacher relations, so this will receive a bit of a lower score because of that, but biases aside, it was nice enough. It was nice seeing a student-teacher relationship in which the adult is willing to be responsible and wait for the student to graduate instead of rushing straight along and inevitably causing the student troubles. It did feel a bit rushed at parts, but the story was still alright for a casual ...
Apr 19, 2015

I will have to start by saying that I was not impressed by the latest of Soubi Yamamoto's works. Having been a big fan of her previous animations (Kono Danshi Uchuujin to Tatakaemasu, Kono Danshi Ningyo Hiroimashita and Robotica*Robotics) I was super excited to watch Kono Danshi Sekika ni Nayandemasu.

I found that once the OVA had actually began, it was littered with clichés and thematics that belong to corny BL anime/manga, and often the 'romantic' lines felt rushed and forced. The exchanges between the two main characters, although endearing at times, quickly became irritating due to the corniness to the scriptwriting. However, ...

Interest Stacks


Recent News

Q3 2018 Anime & Manga Licenses [Update 9/22]

Q3 2018 Anime & Manga Licenses [Update 9/22]

In this thread, you'll find a comprehensive list of anime and manga licensed in the third quarter (July-September) of 2018. Summer 2018 anime which were license...read more

Shounen Ai 'Kono Danshi' Project Gets TV Anime

Shounen Ai 'Kono Danshi' Project Gets TV Anime

According to the official Twitter account, the fifth installment in the Kono Danshi series, Kono Danshi, Mahou ga Oshigoto desu., will premiere in 2016. It will be t...read more

Recent Forum Discussion

Poll: Kono Danshi, Sekika ni Nayandemasu. Episode 1 Discussion
tsubasalover - Dec 28, 2014
23 repliesby yveltalkyogre »»
Jan 9, 2023 1:03 PM
Shadow-Chan - Aug 25, 2014
11 repliesby tsubasalover »»
Dec 19, 2014 8:34 AM