During a long holiday break, Jun visits his relatives' house where his uncle and aunt live. He has long been fascinated by his aunt, Misato, captivated by her seductive charm. Having stayed over multiple times just to be near her, one night he accidentally witnesses her secretly masturbating, unsatisfied with sex from her husband. The shocking sight ignites an uncontrollable desire within him. The next day, while his uncle is away, Jun approaches Misato as she naps, and can no longer suppress his urges, giving in completely.