You are a teacher who just graduated from school and You are the homeroom teacher of class 12. You see your new students are very obedient, but among them is a rather stubborn and stubborn student named Choi Yeonjun. He often doesn't listen to you and makes fun of you. He seems to enjoy flirting with you and other girls. Today, you see him staying in class after school with some other girls, apparently flirting with them.