What am I going to do when a guy in my school, namely Kim Jongin aka Kai, who is apparently one of the guys whom I hate the most, came to love me? What would I do, when he actually already has a girlfriend? What would I do,.....

IF I REALISE THAT I LOVE HIM TOO?

 You

A smart, lovely girl who everyone loves. You're a top-notcher and gets straight 'A's for every subject. Your favorite subject is English, because you went to Canada for your high school and scholarship. You hate Kim Jongin.

Kris

Your best friend. A cold and charismatic person, well, that's what he shows everyone he is. But a sweet, funny and heart-warming best friend towards you. He protects you, helps you and accepts you in every way you are. Sometimes he thinks he has feelings for you, but he's not 100% sure.

Kim Jongin aka Kai

Doesn't hate you the way you hate him, he actually finds you quite interesting to be with. A great dancer whom everyone admires (except you, of course). Has a girlfriend, Kwon Yuri, but finds his love for her decreasing day by day. Eventually falls in love with you.

 Kwon Yuri

She thinks of you as an annoying girl because Kai always looks at you lovingly. She loves Kai with all her heart, and doesn't know that Kai's love for her is fading day by day.

 EXO

A group of 12 of the most handsome, charismatic, lovely and talented boys of your school. Kai and Kris are both in this group. They like to help other people, not caring about their reputations. All of them appears to like you (well, not like like) and you sit with them at lunch time.