Yoshida, a thirty-year-old office worker, is dealing with a bitter heartbreak after being dumped by the woman he's been lusting after for years. To drown his sorrows, he gets drunk at a bar and, on his way home tipsy, notices a high school girl sitting alone under a streetlight in the dark. She is Sayu Ogawa, a girl who ran away from home months ago and who, to survive and have a roof over her head, gives herself up to the strangers who take her in. When Sayu tries to sell him her body for the night, Yoshida yells at her not to bullshit, takes her home, and offers her a safe place to sleep, immediately putting her to clean the house and cook instead of touching her. What begins as a bizarre and risky cohabitation turns into a journey of profound healing: while Yoshida tries to be a responsible adult by protecting her from her insecurities, Sayu must confront a dark past and devastating family traumas before the real world comes knocking on their door again.