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
Free! Movie 5: The Final Stroke - Kouhen
Movie
105m
Painting Rivers and Lakes 4
ONA
25m
Painting Rivers and Lakes 5
ONA
27m
Mignon
ONA
5m
The Summer
Movie
61m
I Am What I Am
Movie
104m
Digimon Adventure 02 Movie
Movie
80m
A Girl & Her Guard Dog
TV
24m
Komada: A Whisky Family
Movie
90m
Hamefura Movie
Movie
90m
Overtake!
TV
23m
Renegade Immortal
ONA
25m
Tokyo Revengers: Tenjiku-hen
TV
24m
