On the first day of school, Sin-woo hears about the dangerous student council who even the teachers avoid. When he saves a kid from being cheated by them, he becomes known as 'one punch man.' After being expelled from defending a friend from the student council's torment, he is invited to join them, which confuses him.

• Park Sin-woo
• Choi Yeon-cheong
• Hong Jun-ki
• Choi Hyun-do
• Ock Yun-jung