In the 1980s, Hyeon Soo, who is from a rich family but causes all sorts of trouble, barely makes it out of junior high and makes it to the next grade where he steps out of the ‘Hurricane’s’ line. In the end, to survive in the wild, he rearranged ranking in the school. He takes turns fighting with every student who came back after a break and is almost the leader ofthe school when he meets Soo Ho. The two fight for the position of school leader, but soon realize they have similar but different characteristics and become friends. Will their diary be as cool as they want it to be?