Nishimori Aoi a regular high schooler gets irritated at the high school's most popular boy, Kugayama Shuusei, because he rejected her best friend's, Shibuya Moe, confession. After comforting her best friend she finds out that she has a new neighbor who she soon finds out to be is Kugayama Shuusei. One day she goes to see Shuusei after she hears some noises from his apartment. When she opens the door Shuusei fall on her, whimpering that he is hungry. Aoi then decides to make him some food. The next day she caught stalkers stalking Shuusei apartment as they begin to fight but are soon interrupted by Shuusei romantic gesture towards Aoi. Aoi becomes flustered and decides to go and make some food for Shuusei to get her mind off of this. In doing so she accidentally sets off the sprinklers in Shuusei's apartment, soaking all of Shuusei's things. Now Shuusei must live with Aoi until his aparment is fixed