Luhan has moved to Korea, to fulfil his dream to become an idol, through SM Entertainment, an entertainment agency. He enrolls in Seoul National School of Arts and there he meets Sehun, a mysterious boy filled with secrets, who is also in the same entertainment agency as him. Sehun is the most popular boy in school, but he is also a bully. He decides to make Luhan his next target to bully, because he sees Luhan as a weak and vulnerable boy. Suprisingly, Luhan starts to develop feelings for Sehun, because he discovers that Sehun actually has a nice side to him. How will Luhan survive the intense training to become an idol? How will Luhan adapt in Korea? And most importantly, how will Luhan confess his love to Sehun?