A son-in-law becomes addicted to the immoral and lewd life with his fifty-something mother-in-law who has a beautiful ass! After his wife is hospitalized, he is forced to live alone. His mother-in-law comes from their home in Niigata. They start living together after a long time apart! Unable to resist her seemingly soft ass, he can't hold back… Their relationship quickly intensifies during the wife's absence!
