She divorced her husband, and her son got a job. He didn't live alone because it took a long time to commute, and he didn't leave the house on weekends. Worried, Orie took her son on a trip to a hot spring. Just the two of them at the hot spring... Even though they know that skin contact is not allowed, mother and son find themselves seeking each other. Just for today, I'll be my son's lover... She loses herself in the pleasure of having her nipples licked and the pleasure of the woman who had forgotten to take her son's penis in her mouth. They lose their reason and have sex many times on this forbidden incestuous trip.