On the first day of consecutive holidays, Negishi came to stay at his friend Yoshio's house.Negishi is fascinated by the beauty and disgusting body of Yoshio's mother, Tsubasa, who welcomes him.That night, Negishi stands in the bathroom before she goes to bed and sees Tsubasa having sex with her cheating partner over the phone.Negishi, who is excited to see her masturbation, plays with Tsubasa's flushed body on the condition that Yoshio keeps her secret.Young Negishi's sexual desire does not know where to stop, and in the middle of it, he goes out of his way to make her cheating partner make a phone call.