Her father-in-law passed away and her mother-in-law, Yuri, became a widow. - Atsushi and his wife were worried about Yuuri, who was left alone in the countryside, and came to check on her. - As a son-in-law, I was genuinely worried about my mother-in-law, but Yuuri was too young and beautiful to call me my mother. - Now that the barrier of being a father-in-law is gone, Atsushi is filled with uncontrollable emotions towards Yuuri, and Yuuri is also unable to control her emotions and body due to loneliness. - And the moment they are alone, their thoughts overlap and they cross a line that should not be crossed...