Knockout hearts.

Seungcheol is a fighter, not just in the ring, but in life. A talented boxer with a dark secret: he's been drawn into the world of illegal underground matches, where the stakes are life and death. Haunted by the brutality of his choices and the weight of a past he's tried to outrun, Seungcheol is caught in a downward spiral. The ring is the only place where he feels alive, but it's also where he's slowly killing himself-emotionally and physically.

Jeonghan, on the other hand, is a nurse-a man of healing, whose quiet demeanor hides a storm of regrets. Jeonghan's steady hands can mend broken bodies, but his heart? That's a different story. He's spent years burying feelings he's never truly let go of.

As they navigate the dangerous, tangled web of Seungcheol's underground boxing career and Jeonghan's desire to save him, both men are forced to confront the painful truth: some wounds can't be healed with time, but with love. But is their love enough to overcome the demons that threaten to tear them apart? Or will they destroy each other before they ever get a chance to truly be together?

Knockout Hearts is a raw, intense story of passion, redemption, and the fight for love-where sometimes the hardest battle is the one you fight within your own heart.