Katayama is a peculiar classmate of Kirie who only shows up at school during heavy rain. He has a delayed response time.
He is the first to transform into a snail-person.

Katayama is a peculiar classmate of Kirie who only shows up at school during heavy rain. He has a delayed response time.
He is the first to transform into a snail-person.
Main
Kirie Goshima, a schoolgirl in the town of Kurouzu-cho, becomes concerned with her best friend Shuichi Saitos father who has become obsessed with collecting and staring at spiral patterns to the ignorance of all else. After Shuichis father kills himself i...
Main
Shuichi is Kiries boyfriend. He is the only one who feels and understands the fact that the town is cursed by the spiral. ...
Supporting
Yoriko Endou is Kazunoris girlfriend, however their families are at odds with each other and do not acknowledge their relationship....
Supporting
Katayama is a strange classmate of Kirie that comes to school only during strong rain. He has a slow reaction time.He is the first to become a snail-person....