"Jaeseoppie-ah!"  

"Ne, Seoppie?"

"Can you play me a lullaby?

"A lullaby? Like what?" 

Kiseop rested his chin on his palm.

"Hmm...Aha! Maybe the one Yiruma plays! River Flows In You!" 

Jaeseop flinched.

"I forgot how to play that, Kiseoppie." Kiseop pouted but he smiled.

"I'll teach you."

When Kiseop was teaching Jaeseop, they had mistakes but Jaeseop finally managed to play it.

One day, Kiseop met with an accident and the doctor called the dorm. Soohyun answered the call.

"Hello?"

"Are you company of Lee Kiseop?"

"Yes, how is he?"Then there was a long silence.

"I'm sorry, but he didn't make it."Was what the doctor said before hanging up. He didn't want the others to know, except Jaeseop. He walked towards Jaeseop and placed his hand on his shoulder.

"Soohyun-hyung?"

"Jaeseop-ah..The-The doctor called me just now.."Immediately, Jaeseop looked at Soohyun.

"How is he?" Tears started streaming down his face.

"I'm sorry, AJ.."

"Get out, hyung.."

"Jaeseop-"

"Leave!" Soohyun nodded before walking out. As soon as he walked out, Jaeseop broke down and when he remember the piano, he walked towards it and started playing River Flows In You, which was Kiseop's lullaby.

Why did you leave me in this cruel world? Why, Kiseop..