The boss I saw at the club is my homeroom teacher

After entering high school, Yeo-ju began hanging out with bad kids due to an incident and gradually became lost. One day, while going to a club with her friends, she overheard a man with a strange aura talking to someone. It turned out that he was the boss of a gang. Yeo-ju, who thought she would never see him again after that day, encountered him the very next day, in a classroom at school.