Tokiko’s mother died 20 years ago and her father Tetsuya is now in his 70's. Her father has a free spirit and is cute. Tokiko is in her mid 40's and still single. She has a strong personality. In their past, Tokiko and Tetsuya did not have a good relationship. It got so bad that they almost ended their relationship, but now they occasionally meet. They go out to eat together and have conversations.
Tokiko decides to publish an essay about her father Tetsuya. To collect information for her essay, she meets Tetsuya and listens to various stories, but it's not just pleasant memories.
Mizutani Shizuku is a self-absorbed overachiever, concerned only with maintaining the highest grades in school. Yoshida 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!