Sister Kako, unable to bear children due to her physical condition, pleads with her brother-in-law and younger sister Ayu for a surrogate pregnancy. Initially repulsed by the idea of intimacy with her brother-in-law, Ayu gradually resolves to overcome her resistance after several months. As physical relations between Ayu and her brother-in-law progress, Kako grows increasingly cold, destabilizing the relationship among the three. The brother-in-law's demands grow increasingly perverse, and as Ayu's body is manipulated, she begins to experience pleasure against her will. This sequel drama explores the tangled web of love and resentment woven between the sisters and their brother-in-law, centered on the theme of surrogate pregnancy.