Fights and... Love Letters?! — WOOSAN

Under the bright lights of Seoul lies a place almost no one knows about. It doesn't appear on maps. It has no advertisements. There are no rules... only money, bets, and blood. Every night, the best underground fighters risk their lives for an audience willing to pay fortunes to see them fall. In that world, where a single mistake can cost you your life, there is one name everyone respects. Choi San. The undefeated champion. The man no one wants to face. But outside the ring, San is completely different. He lives a simple life, carries too many responsibilities, and fights only to survive. He seeks no fame, no glory... just enough money to keep going. Everything changes when the organization decides to assign him a manager in charge of handling his finances and organizing his bouts. Jung Wooyoung. Sarcastic, intelligent, bold, and completely immune to intimidation. What begins as a strictly professional relationship soon becomes chaos for San, who discovers, to his misfortune, that he is unable to stop looking at his new partner. Now he must face a problem much more complicated than any underground fight: he is hopelessly in love. While trying to hide his feelings through accidental flirting, overly romantic gifts, and letters he will likely never dare to deliver, both will be drawn into a world where betrayals, bets, and secrets could destroy them at any moment.