新しく出来た義父があまり好きになれず慣れない生活に苦しむ娘・なつに学校で財布を盗んだ疑惑をかけられた。母に心配をかけたくないなつに義父の毒牙が向く！年頃の発育中スレンダーボディを押し倒し無理やり種付け性交！それから2人きりで絶倫義父の言いなりに暇さえあれば快楽調教！シャワー中も睡●中も暇なく犯し放題！可愛い娘のカラダを最高の中出しオナホに成長させるのも親の義務ってもんだよなあ（笑）

Natsu, a daughter struggling to adjust to her new life and not really liking her stepfather, is falsely accused of stealing a wallet at school. Not wanting to worry her mother, Natsu's stepfather's venomous fangs are turned against her! He pushes down her slender, developing body and forces himself upon her, impregnating her! From then on, they are alone together, and she is subjected to pleasure training at the whim of her insatiable stepfather whenever he has a free moment! He s her whenever he wants, even in the shower or while she's asleep! It's a parent's duty to turn their cute daughter's body into the perfect cum-filled sex toy, isn't it? (lol)