Natsuki adores Natsu, who married her brother, like a real sister, and when she has time, she comes to visit her brother and his wife's house. One day, while she is comforting her girlfriend, Natsuki, who broke up with her boyfriend, Natsu steals her lips with her momentum. Natsu is a lesbian who can only love women, and she confesses that marrying her brother is a disguise for her, and she invites Natsuki into her forbidden world. What will her fate be for Natsuki?
