Eri, a mother who has raised her son Koichi single-handedly. If it's for Koichi's future, he's been on friendly terms with his homeroom teacher, but unfortunately, Koichi's classmate Kawada finds out about it. Kawada, who was originally cunning, uses this as a joke to threaten Eri. Eri, who became their toy, is made into a shaved pussy. And Kawada further tied up her whole body and played with her. Embarrassed, Eri endures for Koichi's sake, but the reality drives her into an even harsher situation...