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! Hayami takes him in as her wife, and their life as housemates begins. But why does it feel like things are slowly starting to change between them…!?