Meanwhile...

f(x), EXO, also Kyuhyun, Eunhyuk and Leeteuk are sitting in the empty room. some of them are watching a movie, and some of them are just chatting.

"I wonder what are Sehun and Krystal doing right now" Chanyeol said.

"Maybe they are... they are.." he continued.

"They what?" asked Leeteuk

"Nothing" Chanyeol grinned after got an eye-sided from Baekhyun.

"SOMEONE HEEEELLLLP!" Eunhyuk screamed, mimicking Krystal's voice. The others just laughed.

"See, no one will open the door" Kyuhyun said and crossed his arms.

"You and your evil mind, good job, Maknae" said Leeteuk.

Flashback...

Amber locked the door and tried hard not to making any sound. The others looked at her in nervous.

klik

'SUCCESS' Amber mouthed. The others just giggled silently.

when the others were ready to left and wait, Kyuhyun stopped them.

'why?' Leeteuk mouthed

'wait, guys.' 

and Kyuhyun took a paper from his pocket, and sticked it on the door.

the paper said

(OPEN THE DOOR OR PUNISHMENT)

SM Entertainment

with Lee Soo Man's sign on that paper.

Their jaw dropped open. Kyuhyun just laughed silently

'Good Job, man!" said Eunhyuk.

And they left to wait for the maknaes.

Back to the practice room...

Krystal and Sehun laughed as Krystal raised her fist in the air and pretended to punch someone. Sehun just laughed at her.

"We are too smart to them" Krystal laughed again. Sehun nodded.

"Then we should pretend we don't know they prank us" Sehun said. Krystal nodded and make 'ok' sign with her finger.

(Sehun's POV) 

She made 'ok' sign after i said we should pretended to don't know hyungs and noonas prank us. and she winked

She winked

at me.