When her parents need to relocate to another city for work, Aoi Nishimori chooses to stay behind and begins living alone in an apartment. Unexpectedly, she finds that her next-door neighbor is Shuusei Kugayama, the "prince" of her high school who rejects anyone who confesses to him—including her best friend, Moe Shibuya. Aoi angrily confronts Shuusei for turning down Moe; the situation quickly escalates, with Shuusei calling Aoi an eyesore, leaving her disappointed in the so-called "prince." To make matters worse, Aoi's clumsiness makes Shuusei’s apartment unlivable, forcing the two to live together in Aoi's apartment as a temporary solution. However, while living under the same roof, Aoi gets to know Shuusei better and starts to realize that he is not the cold-hearted, despicable person she initially believed him to be.