My daughter finally has a boyfriend! Although Yukari congratulated her outwardly, she couldn't help but worry about him being more like a lump of sexual desire than anything else. She was concerned that he wouldn't use protection properly. As Yukari began probing their relationship, she noticed some strange reactions from her daughter's boyfriend... He seemed nervous when asked if they had already slept together. Could it be? Is he still a virgin? The adorable expressions on this young man's face stir something deep within Yukari, awakening her inner cougar.

娘に彼氏ができた。口では祝福していた由加里だが彼氏は性欲の塊のような年頃の男の子。ちゃんと避妊してくれているか心配だった。釘を刺しておこうと由加里は娘とのセックスについて探りを入れるが、彼氏の反応は微妙…。さらに問い質すと焦りのあまり挙動不審に。まだヤッてないのね。もしかして…童貞？娘の彼氏のあまりにも可愛い反応。男の子のウブな表情に触れて、由加里の中に眠っていた童貞キラーの血が騒ぎだす。