Chan-Gyu Hong

Chan-Gyu is part of a gang and hates Yeon-Ho. He has three underlings and is a strong fighter.
Yeon-ho maede him lose his eyesight in his right eye right in front of his younger sister who is now traumatized because of the event which is why he hates him.
However, after getting to know Yeon-ho they start to get along.

After meeting Kwon on the rooftop he falls in love with her.