A drowns in a lewd and intimate life with her big-breasted fifty-year-old mother-in-law! A husband is to live alone after his wife is hospitalized, and his wife's mother comes from her parents' home in Maebashi! They meet again for the first time in a long time, and their life together begins! When his mother-in-law, who can be seen through his open-breasted clothes, is kind to him... they are bound together by their carnal desires!