Hayami is the it-woman at her job—she’s cool, confident, and admired by all. But her has-it-all exterior belies a dark secret...her house is a mess, and she's no good at taking care of herself! Enter Yamamoto-kun—her colleague who thinks the world of her, and who refuses to let her slobbish behavior slide. Soon he’s over at her house often enough that she asks him to move in with her! Where will this roundabout relationship take them?!
At 27 years old, Hayami is 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. Finally together after realizing that their unrequited love was not so unrequited after all, the two become a couple, and Hayami's heart is pounding non-stop from all the innocent intimacy they've been sharing. But when a cute new guy named Hanazuma-kun joins the company, Yamamoto feels the flames of jealousy stirring...