Their rivalry began with that stupid dare she had to do, him, bringing shame on her face. But it isn't really what they thought. 

"Fine I'm giving you a chance"

"FOR GOD SAKE REN IS A GUY, HEEJIN."

"But hey, who knows he might like you someday and regret what he said earlier"

"Stop it Mi-Minhyun! I can't breathe already!"

"What's happening "

"ARE YOU TRYING TO KILL ME WITH THAT ARROW?!"

"So you think I cared? Puh-lease"

                Kim Heejin ⁽¹⁶⁾   

Obnoxious, she's smart and quite shy. She's a very crazy-minded person. 

         Kim Sojoon ⁽¹⁶⁾   

Heejin's step sister.

The queenka in school. She's friendly tho.

Choi Eunji and Kang Sungha ^{(16 & 16)}

Heejin's close friends.

Choi Minki aka Ren ⁽¹⁶⁾

The so-called kingka. Well he's popular alright. He's the maknae of the group called NU'EST.

A popular band in their school. Everyone basically likes and admires him (girls). He stands on to his own words.

Barely agrees things. And thinking a bit too advanced.

Baekho (16)  & Minhyun (16)

Members of NU'EST Popular in school too. And there's JR and Aron ( I didn't put their pictures T_T)

And also Heejin's puppy :3 

 Kiff.

Been bred by Heejin since Kiff was born. Kiff is really playful, but disgusting sometimes. And stubborn too.

Sojoon surely hates this creature and tends to throw it away.