Jung Han-su, how come his name is exactly the same as the name of a famous and powerful person in the legend, so wherever he goes, he will cause a lot of misunderstanding! Although he shouts that everything is fine every day, from the first day of his transfer, including the principal and all the students in the school, they all shout "That person is back~" and gradually avoid him... Although he hopes that "today will be fine", he encounters troubles, that is, the most powerful man in this school, Baek Sung-gi, the charming female class leader Han Min-joo, and the most powerful teacher in the 80s who was admitted to university by mistake because he wrote the wrong answer... Han-su is going crazy~----JUNGHan-su often brings him trouble because of his name. Even though he has set his life motto as living happily every day, there are always people who form groups to make things difficult for him every day. The group of people who are against Han-su include Sung-gi, the school's boss, Min-ju, who often suppresses her desire for men, and Min-sik, the simple but arrogant head teacher...