Left alone after her husband's overseas business trip, Yoko Shirayama reaches her breaking point and deepens her affair with Kyuichi, a man she met through work. Their secret meetings gradually become part of her daily life, and Yoko's heart begins to fall for him. One day, her daughter Nao brings her boyfriend home to hang out. To Yoko's shock, the man introduced as her daughter's boyfriend turns out to be none other than her own secret lover, Kyuichi. Stunned and flustered, she struggles to hide her emotions. That night, Kyuichi stays over. While he sleeps, Yoko creeps into his room, a seductive smile on her lips, and hungrily devours his cock. At the peak of their illicit affair, will a new relationship be born?