Kibum is an famous internet matchmaker in his school. He's created a blog for his school, where girls and guys would PM to ask him to match them up with someone - whether they had a person in mind or not. The bad thing was it took time. But the good thing is, no one knew who he was - everyone knew him on the internet as "Key". And when his best friend (whom, by the way, he's so not in love with, seriously) requests a matchmaking session, who know what Kibum can possibly do?