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Fuji, who can see the "red string of fate" is in an unrequited love with his university classmate, Yuka. However, Fuji is hiding those feelings in his heart. This is because he knows their "red strings of fate" aren't connected. Do you believe in "fate?" This is a love story that will make your heart go "kyun," depicting the love of adults being toyed with by fate.
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 phemonemons 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 non-human being who lives in her "haunted" apartment appeared! "Even if he’s not human, 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!