Aoi Nishimori already resents Shusei Kugayama, the school 'prince' who turned down her best friend Moe, when she discovers he has moved in next door. Then a fire she starts in her kitchen sets off the sprinklers and soaks his place, and Shusei talks his way into sharing her small apartment. Cooking, chores, and school mornings under one roof take the two from constant friction to an awkward routine, and from irritation to feelings neither expected.