Due to her husband Yoji's injury, wife Yukari starts a part-time job. She serves her husband as he continues his rehabilitation, but her son catches a glimpse of her in that act. From that day on, the son becomes conscious of Yukari. Longing for the ballroom dancing she and her husband used to enjoy together, Yukari invites her son. However, she is pushed down and creampied. Unable to turn back, Masato keeps approaching Yukari behind Yoji's back. Eventually, the relationship between Yukari and her son...