父の不倫が原因で両親が離婚した「瑠花」は男嫌いになったが、心に反して体はメスとして成長し始めていた。そんな中、母が再婚。義父と暮らすのは嫌だけど、苦労している母も知っているし、瑠花は仕方なく承諾。瑠花をエロい目で見ている義父は、懐かない娘をどう攻略しようかと作戦を練っていた…。

Ruka's parents divorced due to her father's infidelity, which made her hate men, but her body was beginning to develop as a female, against her will. Then her mother remarried. She didn't want to live with her stepfather, but knowing her mother's struggles, Ruka reluctantly agreed. Her stepfather, who lusted after Ruka, began plotting how to win over his uncooperative daughter…