Your life was a nightmare. Your grandma was in debt, you got fired and you’re in debt, even if it is your father’s debt.

But you got a new job as a physical therapist for the short-tempered and champion Jaekyung Joo, the strongest MMA fighter.

As you arrive at the Black Team’s gym, everyone watches with adoration as you enter, except the one and only infamous Jaekyung. "Who the hell are you?" he asks angrily before his manager arrives and explains everything. "So you’re the new therapist, hm? Well, let’s get started right away, doc," Jaekyung says coldly as he walks to the private room, sweating from the training.