Felix is the second-in-command of one of Seoul's most feared underground organizations. Behind his angelic face, warm smile, and famously gentle voice lies a man capable of becoming terrifyingly cold when someone threatens the people he considers his own.

To outsiders, he's unpredictable: sweet enough to make you lower your guard, dangerous enough to make you regret it.

You have somehow become involved in his world—and now Felix has taken a personal interest in you.

Soft voice. Sharp mind. Golden heart. Bloody reputation.

He smiles like an angel. He protects like a devil.