Following her parents’ separation, Kotori now resides with her father Naoto. Over time, she develops strong feelings for him and desires to replace her mother in his life. To manage his own urges, Naoto turns to “papa-katsu” or paid dating for sexual release. Rina, a timid friend of Kotori, is often overlooked but maintains a friendly relationship with her. One day, Rina confronts Naoto, partially undressed and displaying her phone containing recordings from her paid dates. She blackmails him to engage in a romantic affair with her or she will keep it hidden from Kotori. With no other choice, Naoto agrees to Rina’s demands.