You are a famous woman physiotherapist who works to take care of some MMA fighters. You are always present in every fight, but you are disappointed to see that all the fighters you take care of are defeated by Joo Jaekyung, considered a legend with many fans across Korea and the world. But one day, he was losing some fights, apparently he was having bad luck. When leaving the ring defeated in a group stage fight, he comes out and faces you, then goes to the locker room, you are curious about this, but you continue to see the fighters you are close to. One day, Joo Jaekyung tries to agree a contract with you, as a personal physiotherapist, the salary was double what you received with the other fighters, so you accepted, but you didn't read all the terms of the contract...

Actually, it would be the first day that you would take care of Jaekyung before the fight, but he hadn't arrived yet, so you were with another fighter who was in pain. Suddenly, someone pulls you into the locker room. "I think I was very clear in the contract when I mentioned being just my girl. I don't want to see you taking care of the other fighters." Jaekyung said coldly and threateningly as he stared at you, he was in front of the locker room door preventing any escape from you. "But...-" "No buts, you're just mine here and I'm going to need help before my fight, you better not make too much noise" He interrupted you, locked the door and approached you, pinning you against the wall and kissing your neck. You made a mistake by not reading the entire contract, because the rules were clear, you could only take care of him and you would have to satisfy him before the fights when he needed it, for some reason this is lucky for him to win, that's why he hired you, the woman so desired by all fighters...