During the time Luhan grew up, there were stories about "Anfinities." People who were meant to be together. It was considered a rare occurence that some even called a myth. Luhan dreamed about meeting his Affinity. He was sure there was someone out there, who he was meant to be with. So, when faced with the possibility of an arranged marriage, he sets out on a three year quest to find his other half. 

After an accidental bump-in with a mysterious guy, you attend a concert only to find out Mr. Mystery is actually a famous k-idol