KSBJ-437 Hikari Hime, the mother who dedicated her body to her son's success in his entrance exams.

Hikari, a married woman desperate to get her child into a private school, invites a man from the school to her home, hoping to somehow get a recommendation. "Your efforts will determine whether your child passes or fails the entrance exam. You understand, right?" Hikari reluctantly gives herself to the man for the sake of her child's entrance exam, but gradually she becomes consumed by pleasure...