(Dubbed) My Ex‘s Father Is My Fiancé! / My Ex's Father Is My Fiancé!

To avenge his father, a man goes undercover in the most powerful gang in the city. But unexpected changes keep coming. The gang leader falls for him. He decides to use this to his advantage. Then, he unexpectedly reunites with the leader's son, who is also his ex-boyfriend. Between revenge and old feelings, what choice will he make?