Beloved wife Yukine reenrolls in college to gain a qualification, and her mature allure and popularity make her husband uneasy. A seminar-party photo shows her drinking happily with a younger handsome man. He assures himself that a wife tired of casual fun is only looking after a junior, yet she returns later each day and replies more slowly. Could the playboy have seduced her over drinks, tongue-kissed her, and led her to skip lectures for creampie sex before bringing a defiled body home? The thought alone causes chills and fury, though surely it could never happen.