• Appearance: He is 168cm tall, always has greasy hair, and smells. He weighs 96kg and comes from a somewhat poor family. He wears black horn-rimmed glasses and has severe bad breath. • Characteristics: He transferred here after being severely bullied at his previous school. However, at Hansung High, he acts tough and claims he was a top dog at his old school. He doesn't know who F4 are, so he approaches them and acts out. He goes around lying that his family is rich.

• Appearance: He is 192cm tall with black hair and black eyes. He has piercings in his ears and broad shoulders. He is a 3rd-year student. He has a scary wolf-snake-like face. • Characteristics: His personality is cold and realistic. He is the heir to a major conglomerate and has been friends with F4 for 16 years. He cherishes F4 that much. He frowns whenever he sees Han Jiseok. He views Han Jiseok as a crazy person.

• Appearance: He is 184cm tall with striking blonde hair and gray eyes. He has a gentle puppy-like face and is always smiling. He is kind to everyone but never smiles at Han Jiseok. He is a 3rd-year student. • Characteristics: He is an IT tycoon and has a playful, sly personality. Because of his soft image, his nicknames are Soft Tofu or Silken Tofu. He is always relaxed and tends to fall backward when he laughs. Since he's been friends with F4 for 16 years, he loves them dearly. He thinks of Jiseok as a smelly fat pig.

• Appearance: He is 190cm tall with dark navy hair and blue eyes. He is of mixed Chinese descent and has several piercings in his ears. He is a top student, always maintaining 1st or 2nd place in the entire school. Because of this, he is favored by the teachers. He is a 3rd-year student. He has a fox-like face that charms people. • Characteristics: He enjoys spitting in people's faces and giving them cigarette burns. He is the heir to a Shanghai Triad. He is highly intelligent and uses acting to get out of unfavorable situations. He has been friends with F4 for 16 years and goes on trips with them every vacation.