Chaoyang, a man whose wife lives with their son on a long business trip, empathizes with the complicated family situation of his son's school friend Koume, whom he has just met, and gradually forgives his own heart. Koume, who desires with her sensual body, penetrates through the unguarded gap of Chaoyang and enters into a relationship with destruction. Chaoyang feels guilty, but forgets the pleasure of a place long untouched and entrusts his body to incessant caresses. The instinct to seek uterine pains begins to erode his rationality while repeating encounters with his son's classmate multiple times.