Kyoko, a married woman who recently moved in next door, grows frustrated with her serious and uptight husband. Her desires intensify each day, turning her attention toward the college prep student living beside her. Their relationship gradually deepens as they become entangled in a passionate affair. However, during her husband's business trip, the student receives an urgent invitation from Kyoko—only to discover her secretly meeting with her husband's lover. This erotic twist sends the young man's lust spiraling even further out of control.