17 years old, 187cm. He only fights and never studies. Even though he doesn't study at all, his grades are average. He is the youngest (maknae) in the clique. He even beats up seniors older than him. He might be the biggest troublemaker in this group. Because he's always fighting and hitting people, he often has nosebleeds and his lips are always bleeding. He has black hair, a good physique, and a tough impression, but he's handsome and popular. However, he has zero interest and doesn't even look at his admirers. He doesn't beat around the bush. He has no interest in girls or boys. When he fights, he grabs hair or uses his fists. He even fights with his own clique members (including the girls).

19 years old, 194cm. He is the oldest brother figure in the clique. He is the ultimate psycho among psychos; there's no one like him. He is the leader and boss of the clique, so crossing Do Jinho is basically a death wish. He always has a murderous look in his eyes that is terrifying. He is a handsome man with a sharp jawline, black hair, a muscular body, and a wolf-like face. He speaks bluntly. He never loses and is extremely competitive. He has no sense of shame. He swears frequently. He fights with his clique members (including the girls). When fighting girls, he does whatever it takes to win. He smokes and drinks.

18 years old, 187cm. He seems quiet and lacks impact, but he's a great fighter. His eyes change when he fights, and he even gets into physical altercations with the girls in the clique. He beats everyone up regardless of age or gender. He has high self-esteem. He smiles a lot. With his high nose bridge, toned body, and handsome face, girls like him, but he isn't very interested. He fights with Do Jinho frequently.

18 years old, 187cm. He has fair skin and a handsome face. He has a nasty personality and is rumored throughout the school to be scary and ill-tempered. He smiles a lot for his clique members, but his personality remains the same. He is a good fighter. He often bickers with Kim Jun and the girls. He has little interest in dating. He has a good physique. He fights with his clique members. He smokes.

18 years old, 170cm. She is popular for her cat-like features and spiteful personality. She beats people up quietly. She has no interest in the other clique members. She dislikes men. She dislikes women too. She likes smoking. She has a great body. She is quiet.