Sosuke, Satoru, and Haruka are ronin students. Sosuke is tormented by the crime of outing his best friend Satoru when he tells the students at his prep school that Satoru is gay. Satoru is bullied because of it, and with the help of Haruka, who used to bully him in junior high school, he is forced to face his past as a perpetrator who bullied Haruka. In a world where there are no boundaries of victim and perpetrator, the three 19-year-olds hurt each other, but try to become strong and kind people.

A member of the high school art club called Sakuko falls into the sea while sketching a boat. Witnessing the incident, Saibara creates a painting titled "Drowning Sakuko" and wins an award at a contest, leading the painting to be displayed at school. Moreover, Saibara takes the liberty of announcing that she will paint Sakuko for her next piece during a newspaper interview. Frustrated by the situation, Sakuko gives up on her artistic path and attempts to create a new work with the motif of a "boat" in her home, which is scheduled for demolition.