You(Do/Kim Sohee)

-Actually a very very beautiful girl but she wear glasses because of some reasons.

-orphan

-adopted by kyungsoo's parents

-Likes kai but he doesn't notice

-Nerd

-People hates her in school, always get bullied.

-bestfriends are kyungsoo and jongin but she told them to stop following her because they are in a kingka group

-something happened to her.

Kim Jongin a.k.a Kai

-your bestfriend

-Deeply in love with Seulgi,your classmate,queenka

-Your bestfriend but since you told him to stop following you around,he joins his group and watches you getting bullied.

-Because of his pride,he lost somebody that he just noticed in the end

 Do Kyungsoo a.k.a D.O.

-your bestfriend/ 'oppa' since young.

-He didn't listen to you, instead, he always protect you.

-He's the only one who knew what happened to you

Kang Seulgi

-Kai's crush

-Because of her, your relationship with jongin fell.

-Jongin finds you just to know how to woo her.

-she doesn't like you

PS.I have no hate towards seulgi, just find her suitable for this character :)