Mitsuo and Suzuka have been married for 23 years and are still good friends. - Even though my son Yuji has grown up, we still take a bath together every day. - Then, in the bath, Mitsuo, who has a strong sexual desire, sucks on Suzuka's nipples while being horny, and her mother becomes just a female in the bath, forgetting to keep her voice down and sucking on Mitsuo's cock. - Unaware that their parents were kissing and mating in the small bathroom, Yuji gave them ``comfortable bath goods'' as a gift for their wedding anniversary...