I Declare Vengeance!

Yun Jejin never asked for much—just a shot at rising above the wreckage of his unlucky life. But things go from bad to worse when a debt collector shows up at his door, demanding repayment for a loan he foolishly co-signed with a so-called friend. With nothing left and a burning grudge in his chest, Jejin chooses the one path he never imagined: stepping into the underworld.
His plan? Fight his way to the top and take back what the world stole from him.
But he’s not as alone as he thinks. Watching quietly from the sidelines is Choi Taekmu—a hulking enforcer with more softness in his heart than his fists would suggest, and a growing affection for the greenhorn gangster. As they carve a path through back alleys and blood debts, revenge might not be the only fire threatening to consume them both.