Once Upon a Stupid kind of Story..

Androgynous an·drog·y·nous /anˈdräjənəs/
Adjective Partly male and partly female in appearance; of indeterminate . Having the physical characteristics of both es; hermaphrodite.

Charming charm·ing /ˈCHärmiNG/
Adjective Pleasant or attractive. (of a person or manner) Polite, friendly, and likable.
 

Amber Liu was the girl who worked at Happy Bean, the quiet almost transparent coffee shop that nobody knew. She was the girl who was always mistaken to be a boy, and the girl who everyone called a lesbian. She was manlier than the average girl, but more charming than any "Prince" there was. But, a lesbian she was not, for men she did love, although her appearance said otherwise. For Amber, it was as if she was always loving girls, and she did - just not that way. Too accustomed to her own ways and too discreet to really want to argue, the tomboy named Amber was forever labeled a y, lady lover. But, one day, when a group of 12 iful college students find themselves stumbling into the unknown coffee shop, a game of chance begins and so does a realm of havoc.

Amber is the mistaken female. EXO is the idiotic group of 12.

What starts as a game to win the title King.
Ends as a bet to win the pretty, androgynous tomboy.