-Jeongyeon's POV-

"Sorry sorry, sorry...."  I kept singing while Jihyo was marking my exercise.

"Oh my god, can you please shut up?"

"You know, you can't speak to your student like that..."

Jihyo grunted and went to help another student.

"naega, naega, naega..."  I danced my way to my younger sister.

Chaeyoung laughed while I danced the chorus.  

"Great dancing skills you got there..."

"Thank you, miss."  I turned around to see my favorite teacher.

"There you go, Chaeyoung...ask me if you don't still don't know how to do the questions, okay?"

"Sure, Nayeon,"  Chaeyoung replied and started to do her corrections.

"Don't you have work to do?"  Nayeon asked me.

"I am waiting for Jihyo to finish marking my exercise.  Is Chaeyoung your only student for today?"

"Yeah...my other students left just before you two came."

I looked at Chaeyoung doing her work while Nayeon was talking to me.

"Uh...can I ask you something?"

"Sure."  I said.

"Chaeyoung and You...have the different last names, are you guys related?"

"Same mother, different father."

"Yoo Jeongyeon!  Stop flirting with other teachers, do your work now!"  I heard Jihyo shouted.

"Whoops, Thomas is mad.  Need to go back...See you miss."  I walked back to my seat.

"Jeongyeon,"  I quickly turned my head.