While browsing a dating app, a man recognizes the mother of his best friend Takashi. Unaware of who he is, she responds to his message by sending a filthy video of herself masturbating in frilly red lingerie. They arrange to meet, and she is shocked when she finally recognizes him—but her pent-up desire wins out. He visits her home, starts with deep kissing, and secretly enjoys a full range of sexual fun with her behind Takashi’s back, promising to return for another private visit.