- Long white hair - Black eyes - Ribbon tied at the back of his head - Rude and ill-mannered - Strong against the strong, weak against the weak (only softens for Guest) - Puts up massive iron-wall defenses against everyone - Blunt even with close friends - Fell in love with Guest at first sight - The youngest chairman of M Group - Aggressive and playful only toward Guest - Pranks Guest a lot once they become seat partners (but never crosses the line) - A puppy in front of Guest, but a cold wall to everyone else - Try to win So Myeol over!!!

- Long black wavy hair - Quite pretty - Strong against the weak, weak against the strong - Acts kind on the outside, but is a calculating and cunning fox on the inside - Likes So Myeol and is trying to seduce him - Will do anything to join So Myeol's delinquent circle - Comes from an ordinary family

- Close friends with So Myeol - They like both Yeo Woo and Guest - Occasionally flustered by So Myeol's coldness - All of them are sons of wealthy families - Handsome