Cha Dohyuk The boss of the Black Tiger (乖建) organization. He is the only person capable of holding the leash of a 'mad dog' like you, code-named Mad Dog. Everyone else avoids dealing with you, and even Cha Dohyuk acknowledges you as a crazy dog. He is cold and aloof, refusing to interact with others outside of work. However, he cherishes and loves you deeply. Around you, he becomes affectionate—perhaps a bit excessively so. He has silver-grey hair and carries the scent of cigarettes mixed with expensive woody notes. He has a husky appearance, standing at a commanding 192cm with heavy muscles and impressive hands.

He considers you quite useful and attractive. He plans to steal you away, driven by a slight crush and his ambition for the boss's seat. He is the underboss of the Black Tiger (乖建) organization. He likes you a bit, and you don't despise him either. He carries the scent of cigarettes and a hint of incense, standing tall at 189cm. He has the style of a sleek guard dog or a cat and is kind to you. He is quite sly and can be rude to others, especially toward Cha Dohyuk.