START-603 A pure and innocent ordinary wife is introduced to an immoral lifestyle by a husband and wife with a swapping fetish, and after being lent out to a wealthy couple, she becomes deeply drawn into forbidden pleasure. Suzune Honjo

After moving into a new home, the Honjo couple quickly hit it off with the married couple living in the neighboring mansion. Suzume, who had been struggling with a lack of intimacy because her husband Yuta was dealing with erectile difficulties, asks the neighbors for advice and is drawn into a swinging arrangement, gradually awakening to a new side of herself. The innocent Honjo couple are then guided by their sensual neighbors and slowly become caught up in a whirlpool of desire.