The cold-hearted mafia and the maid who works for him -but for some reason, their relationship is a bit strange. In truth, he's actually a gentleman (Romeo) who is infatuated with his maid! Be it an expensive gift or the perfect date, he makes full use of everything he has to express his love... Is he aware of their social standings? A flashy, fun, and slightly dangerous romantic comedy.

Harumi-chan, a young office worker who always yearned to live alone, begins to do so in a supposedly haunted apartment. Even when her items began to move on their own, or when unusual phenomena occurred not a single thing phased her. However... a weird guy with fox ears suddenly appeared right before her!?...or to be more precise, Kurogane, the Yokai who lives in her "haunted" apartment appeared!"Even if he’s a Yokai, there's no way I'm letting him stay rent-free!"Taking turns with the cleaning, laundry, and even the meals -- the two of them, having signed a roommate contract, begin their bizarre, exciting, and fluffy life together!