Hyukjae takes great pride in being the most beloved teacher at SM Highschool. He's won 'Most Popular Teacher' five years in a row (take that Choi Siwon!) and he doesn't intend to lose the title this year. That is until the new Math teacher Lee Donghae strolls into his life, sweeping half the school off their feet and threatening all of Hyukjae's hard-earned work. Now Hyukjae is stuck with the difficult task of protecting his title while simultaneously attempting to prove to the rest