"Hikaru" had thrown herself into an affair. Worse, the other man was her husband's best friend. Even knowing it was unforgivable, she became addicted to the abnormal play and insatiable dick that were so different from her husband, and couldn't break free. As the play escalated further, she was in a state where exposure could happen at any moment. Amidst this, the man made a proposal. Which child would she become pregnant with—a forbidden game now begins, where she accepts her husband's and her lover's sperm on her dangerous days and is impregnated. Viewers will hold their breath, watching how she responds to this risky gamble.