Satomi has been married for six years. At the beginning of their marriage, things were going well with her husband, but recently things have become strained and their relationship is delicate. Satomi wants to have a child and is thinking that they should repair their relationship, but she finds out that her husband has been cheating on her. The other woman is apparently Anna, his ex-girlfriend from his school days. A cold and sharp battle between women breaks out over her indecisive husband. The repeated cycle of stealing and taking back finally leads to a crazy threesome with his beloved wife and her ex-girlfriend...