On their fifth wedding anniversary, Ai went on a hot spring inn trip with her husband. However, she was aware that her lover had also come along. Unaware of the situation, her husband became intensely aroused instead. In the room against the wall, in the outdoor bath, and even beside her sleeping husband, Ai passionately demanded her lover. Paying no mind to her husband's desire for children, Ai insisted on being creampie by her lover. These impulsive actions left a deep mark on her heart.