Mizutani is a self-absorbed overachiever, concerned only with maintaining the highest grades in school. Haru is an impulsive short tempered brute, who scares everyone with his explosive bursts of violence. Haru gets suspended on the first day of school when he encounters some bullies harassing a student and dispatches the bullies with great bloody violence. Mizutani is tasked with delivering school materials to Haru who interprets this as an act of friendship and latches on to Mizutani, much to her dismay. And so begins a strange and potentially combustible relationship!
Yuzan is having a birthday party and it is imperative that Haru attend. It’s not so much that Yuzan wants Haru to be there as it is a demand from their father. The Yoshida family requires certain appearances to be kept and Haru being at the party will show that the family is together and not the actual mess that it is. But attending the party comes with great challenges. Haru may combust when he feels that attempts are being made to control him.