MAKI is surprised when suggested to masturbate while wearing only a sweater over her naked body, but she quickly becomes aroused watching a man jerking off. Meanwhile, Riku, shy and hesitant, initially resists, saying "It's embarrassing, I don't want to," but once she starts, her body reacts intensely to a vibrator she's never used before. She thrusts her hips upward, growing more excited with each passing moment—her responses resembling a first-time experience, blending eroticism and shyness. On the other hand, Chisato, in her school uniform, spreads her legs in a wide M-shape and teasingly stimulates her clitoris with her middle finger. She rubs herself "korikori" over her panties before giving in and touching her bare skin, unable to hold back. She climaxes right there, thrusting her hips forward, displaying a genuinely girlish and innocent reaction. This work captures the unique responses of each girl, portraying a mix of eroticism, embarrassment, and pure emotion.