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 continues to hide her relationship and secret living arrangement with Shusei. Their love nest now includes Shusei’s cousin, Leon. The three of them live together to convince Leon that Aoi is worthy of being Shusei’s girlfriend. Tensions mount at home while the competitive spirit extends to their school’s cultural festival where students vie for top rankings and social clout. Leon continues to capture the hearts of all the girls—but there’s one special person who eludes him. Can Aoi reckon with her true feelings and manage what has truly become a love triangle?