A sex movie of a girl named Sumire Kurokawa, she has a secret that she can’t tell anyone, which is… her butt has consciousness! Sometimes it will take control of Sumire’s body, saying and doing things against her will. One day, Sumire’s butt falls in love with the young man who just moved into the room next door at first sight. And so her butt takes control and performs lewd acts to seduce him. Unable to resist the invitation from the beautiful girl, the two make love wildly. And just like that, even though she doesn’t want to, Sumire’s butt forces her to go and have sex with him over and over again. And gradually, the feeling of pleasure that this young man brings conquers Sumire. Without needing her butt to remind her, she takes the initiative to go to the neighbor and wants him to satisfy her sexual desires…