At 26 years old, Hayami is four years into her career as a saleswoman. She's an ace when it comes to her work, but at home she becomes a massive slob. It just so happens that Yamamoto-kun, her junior who carries a bit of a torch for her, is a pro at housework! Smitten with his domestic prowess, Hayami takes him in as her wife, and their life as housemates begins. Although they can't seem to close the distance between them, will things change when Hayami suddenly realises her feelings for him?