Makoto, an art student, suddenly announces he wants to drop out of university, claiming he feels too embarrassed to draw nude figures. To discuss his feelings, his mother, Aiko, invites him on a hot spring trip. There, she decides to pose naked for him, asking, "You wouldn't feel embarrassed by your own mother, would you?" As she undresses and strikes a pose in full nudity, she resolves to take Makoto's virginity. A shocking story where the bond between mother and son collides with the boundaries of art and desire.