Reiko Nagayama is a married woman whose husband is always working late and whose son is often out playing, leaving her alone each night with her pent-up desires. One day, she reunites with her childhood friend, Saito, who has long been attracted to her sexy demeanor. Now grown, Saito can no longer contain his urges and, seizing the moment when Reiko stands up, he reaches out and touches her groin. Seeing his bold move, Reiko gives in to her own suppressed lust and turns her attention to the young man, drawing them both into an increasingly intense and intimate relationship.