For the promise he made when he was young and ignorant, he committed himself to a black cat. In front of others, he was a silly cat she kept in captivity; behind the scenes, he was her creditor, coming to collect the love debt she owed him. Walking on sexy catwalks, hiding in dark corners, ready to take her away at any time. Even if I can't take her away, I still want her life to be a mess and she will die alone. Is it right or wrong to fall in love with her? Can this love of revenge continue, and where will the gears of fate take her...