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]+ More
Characters & Voice Actors
Recommended for you
Super Lovers 2
TV
24m
Toshokan Sensou: Koi no Shougai
Special
24m
Yuki Yuna is a Hero
TV
24m
Yuyushiki
TV
23m
Amagami SS
TV
24m
Bartender
TV
23m
Date A Live: Date to Date
OVA
24m
Crimson
TV
25m
Mobile Suit Gundam II: Soldiers of Sorrow
Movie
135m
Wave, Listen to Me!
TV
24m
Aikatsu!
TV
24m
Chrome Shelled Regios
TV
24m
