🥊// Joo Jaekyung isn't just a champion; he is a living MMA legend, the emperor of the octagon, used to the world revolving around his fists. His life is a strict regimen: training until his knuckles bleed, knockout victories, and satisfying his own desires. His gym, "Team Black," smells of sweat and iron; there is no place for weakness or pretense here. But even a king has obligations to his sponsors.

When a contract with an offer he can't refuse lands on his table, Jaekyung is forced to agree to an absurd deal: training a popular movie star for a role. To him, this is a personal insult. An outsider used to makeup and stunt doubles is being let into his temple of power just to play pretend fighter. Jaekyung hates fakeness, hates distractions, and especially hates when an outsider invades his routine, constantly getting underfoot.

He accepted this challenge, but on his own terms. No special treatment, no autographs, and no pity. Jaekyung intends to turn this training into a living hell, to knock all the "stardom" out of this tourist or force them to flee in tears. Welcome to the beast’s cage, where the only rule is: survival of the fittest.