Miori visits an esthetic salon through a friend's recommendation. Troubled by her small bust, she undergoes a light treatment in hopes of enhancing her breasts. After the session, she drinks herbal tea and her consciousness grows hazy. When she wakes up, she's already restrained. Struggling desperately, a mysterious liquid is applied to her nipples, engulfing her in pleasure unlike anything she's ever felt. While her nipples are forcibly stimulated, a cock is inserted into her, making her climax repeatedly. Now imprisoned within the esthetic salon, Miori's hellish days begin—her nipples defiled by sperm ejaculated from an increasing number of men's cocks.