Nakahara Sunako, a high school girl whose interests include horror movies, coffins and gore, is sent by her aunt to live in an extravagant mansion with four ridiculously handsome boys. As if living with these “radiant creatures” who give her constant nosebleeds isn’t hard enough, she soon discovers that the boys have made a bet with her aunt: in exchange for free rent, they will try to mold Sunako into a magnificent lady. As someone who has cast aside all her femininity and sworn to live in darkness, Sunako is ready to do whatever it takes to nullify these efforts; but is there a way for the creatures of darkness and light to coexist?