Wu Yifan and Wu Kris are twin brother. Both born at the same time, same day, same month, and same year. Both go to the same school. Only.. there is still a major difference in them. Both are smart, yes. Both are sporty, yes. However, Wu Kris is more reserved, shy, and doesn't like to show off that much. His brother though, takes every chance he gets to show off.  Yifan helps his other brother with Jinmyeon, but how will it turn out?