Saki is worried about her stepson’s behavior since he’s reached puberty. She’s noticed that he’s been buying some strange items online. When she catches him playing with a realistic love doll, she gets a little creeped out.

One day, a teacher comes to their house with a student who accuses Saki’s stepson of groping her. Saki convinces her stepson to touch her breasts instead, so that he won’t hurt anyone else. She tells herself that it’s not really sex, but just a way to help him deal with his urges. This is the strange daily life of Saki and her stepson.