Mayama Shizuka is relentlessly bullied by her classmates in her class' group chat. She befriends a loner from her class, Yukawa Asano. Asano creates a group chat for them and a loner from the next class, Yokota. Shizuka discovers that the perpetrator of the bullying was in fact Asano. Asano confesses that she started it because Shizuka's pushover manner annoyed her...