Bathhouse enthusiast Hajime tries to convince his best friend Kenichi to share his hobby, but ends up going alone as usual. He orders a body-scrub treatment and is stunned to find that the attendant is Kenichi's mother, Momoko, who works there part-time. Her touch leaves him so aroused that his erection nearly tears through his paper underwear. Feeling sorry for him, Momoko offers to get him off by hand and begins stroking his huge cock, opening the way to far more than a simple scrub.