A sudden event disrupts a married couple's daily life. When the husband accompanies his wife to a class reunion, he discovers the existence of a man from her past—Ichika's ex-boyfriend, Uchida. As memories of their previous relationship resurface, he pressures her with alcohol, urging her to relive their past intimate encounters. While Ichika has been struggling with dissatisfaction in her current sex life, revisiting these memories ignites a new inner conflict.