Rika, who is about to get married, decides to visit a bust-enhancement salon. Initially at ease with the pleasant therapist, she gradually grows confused as his fingertips begin stimulating the tips of her breasts. The therapist obsessively teases her nipples, and though Rika resists, her sensitive body responds, succumbing to pleasure from the nipple play. Realizing her own arousal, she becomes addicted, hiding this newfound sensitivity from her fiancé and returning to the salon again and again.