Two years after marriage, ruu, who had been living alone in Tokyo while her husband was on a long business trip, accidentally reunited with her former lover, kanna, on the street one day. sensing kanna's circumstances, she reluctantly took her in as a houseguest. the two, unable to sever their lingering feelings, gave in to impulse and fiercely sought each other's bodies to fill the empty time. despite knowing it was wrong, they became addicted to adulterous sex and fell into a twisted relationship as lovers.