Main Characters:

Pyo Ji Hoon
Yoon Bo Mi

Extended Characters:

Yang Jung Yoon (Pyo Ji Hoon's 'noona'/lover)
Ok Taec Yeon (Yoon Bo Mi's 'oppa'/lover)

SNEAK PEAK:

"Yoon Bomi...? Ahha, I got this noona, don't worry, I won't let any man hurt you like this" said Jihoon. 

"Kudae, do something for noona and noona will repay you" said Jungyoon.

"What will that be huh?" ask Jihoon.

"Noona, will give you anything you want" said Jungyoon.

"Araso, as you say" said Jihoon.

"Oppa!!" shouted Bomi as she wave to Taecyeon and ran towards him and hug him.

"Whoa, becareful there, before you get hurt" said Taecyeon.

"Araso, where are we going now?" ask Bomi.

"Anywhere you want" said Taecyeon.

"Araso, let's go eat then" said Bomi.

The girls from the crowd talking to each other quietly while looking at Bomi and Taecyeon. 

"Wow, a girl like her get such a handsome guy" said the girls that don't like Bomi in school.

"Are you doing okay in school?" ask Taecyeon.

"Neh, my senior year is almost done, I can't wait till it's done, then I am off to college" said Bomi.

"Arsao, let's go" said Taecyeon as he gave Bomi a ride.

A little more about the Characters:

Pyo Ji Hoon - A guy who would do anything for noona, he's blinded from her and does care what other says about him as long as it wasn't his noona. He is getting revenge on Bomi because she is close to Taecyeon and Jungyoon and Taecyeon were in love before.

Yoon Bo Mi - She's a really quiet girl who doesn't say much. She remains happy but inside she is a girl who is sad. Her stepfather always abuse her mother and she always tries to run away so that he can't hit her too. Taecyeon sees that and wants to be by Bomi's side and help her through life.

Ok Taec Yeon - He's a guy who left everything behind just to protect Bomi. He left Jungyoon for Bomi, all because he just wanted to protect Bomi, but she never understands him so he left her. He loves Jungyoon but then he pities that no one is there for Bomi.

Yang Jung Yoon - She is close to Jihoon and she tells Jihoon to do stuffs for her because she knows how much he likes her. She want to revenge Bomi because she stole Taecyeon from her. So she told Jihoon to get closer to Bomi in every way no matter what and hurt her.