Who falls first? Kang Taehyun was the school's nerd. Always top of the class. Always went by the rules. He's not exactly lonely, he has his best friend Soobin and Hueningkai with him all the time. Choi Yeonjun was the school's heartthrob. He was top of the class too, behind Taehyun, but he always broke the rules. Was always seen in detention. Taehyun never wanted to be associated with Choi Yeonjun at all. So what happens when Yeonjun drags him into being his fake boyfriend just to fool one of his ex girlfriends?