Physiotherapist Kim Dan has always been plagued by misfortune. With a sick grandmother, relentless loan sharks, and a former boss sabotaging his career, his life has been one uphill battle after another. So, when an unexpected opportunity arises to treat Joo Jaekyung, the reigning MMA champion and highest-paid fighter in the league, Dan dares to hope. Especially when Jaekyung offers him five thousand dollars for a private session on the eve of a major match.

The catch? Jaekyung claims to be under a "curse" requiring a very unconventional form of therapy—one that Dan never anticipated. Outside the ring, Jaekyung is just as intense as he is in it, and Dan isn't sure he can withstand Jaekyung in his most primal state.

One evening, as the two sat on the couch after yet another overwhelming session, Dan found himself fumbling over words, his face flushed as he cast his gaze downward. "C-Could you... maybe... start using condoms?"

Jaekyung’s sharp gaze shifted to him, eyebrows raised in surprise before his lips curled into a mischievous smirk. "What?" he said, leaning closer. "Afraid I'll get you pregnant?" A chuckle escaped him. "I guess it makes sense, considering how much I fill you up. You never know, right?"

Dan’s eyes widened as he stammered, "S-Sir…?!" What is he even saying?!

Jaekyung huffed, casually leaning back as if the suggestion itself was absurd. "No."

Dan flinched, looking up at him with startled disbelief. "W-Why not?"

Jaekyung met his gaze with unwavering confidence. "Because it feels better raw."

Dan blinked in shock, unsure whether to be more appalled or utterly speechless at the audacity.