Aoi Nishimori is a high school girl who lives alone in her own apartment, but to her surprise, she discovers that the prince of her school, Shusei Kugayama, has moved in next door! To add to this, a series of crazy happenings result in the two living together under a single roof! Shusei is known to be a heartless guy and Aoi particularly hates him after he coldly rejected her best friend, so a life of cohabitation seems like a recipe for disaster. And yet, Aoi somehow can’t stop her heart from pounding when she’s with Shusei…
Aoi still secretly pines for Shusei’s affection but constantly worries that revealing her feelings to him will bring their living situation to an end. Meanwhile, a new neighbor moves into Aoi and Shusei’s building—and it’s a student from their high school! Will this new resident bring big changes to Aoi and Shusei’s secret cohabitation?