Yayoi is a cute wife who calls her husband "Darling" and enjoys a steamy, erotic relationship with him every day. However, one day, due to her absent-minded nature, she accidentally takes her husband's friend's cock into her mouth. Deep in the throes of masturbation, she mistakes it for her husband's and ends up gushing a massive amount of squirt from another man's touch. The story unfolds as she waits for her husband in nothing but a naked apron, getting caught up in this unexpected and arousing predicament.