Every weekend, he drinks at his colleague Shota's house, where Shota's alluring mother Yuka always welcomes him with a warm smile. One night after the last train has gone, he searches for more alcohol and notices light and voices coming from her room. Peeking inside, he discovers Yuka streaming on a secret account. A few days later he confronts her, torn between shock and excitement. Asking whether he can keep a secret, she climbs over his crotch and takes control.