Mother-in-law, Ayano, whose father-in-law passed away and decided to live with Wataru couple. A cute child was born, and three generations of parents and children lived happily, but... Wataru is attracted to Ayano's adult sex appeal and beauty that his wife does not have. One day, while Ayano and Wataru are weeding in the garden, Ayano feels lightheaded and hugs her. Wataru, who has exploded in his feelings until now, kisses Ayano at close range.
