Yuko, an only child about to start high school this spring, is overprotective of her son because of his love for him. However, one day she receives a message from him that he secretly filmed… Just as the admission decision is finalized, a tragic incident occurs to her son. "For my child's sake…" Yuko pleads, and the teachers offer a settlement: "Become the object of male teachers' affections for one day." Obeying their demands for the sake of her beloved son, Yuko unknowingly begins to realize her own masochistic tendencies…