Kim Namjoon is a talented wealthy guy who attends a private school. He got everything everyone wants except one thing. Friendship. He needs a friend who won't care about his riches since all of his friends only care about materialistic things. But when he comes to meet a girl named Sera who is really cute, Namjoon becomes very elated and glad because sera is the kind of friend that he hoped for, but while getting to know 'sera' Namjoon falls deeply in love with 'her' beauty. but what will he do when it turns out his precious 'sera' is actually a guy? will he still love him or will his feelings fly out of the window?