In their apartment, Heerin has been noticing some changes in the past days.

"First it was Yeonnie. Now it's JaeEun after Raseul. What on earth is happening?" she mumbled, eyeing her friends suspiciously from the kitchen.

Raseul kept on studying cook books and alike stuffs, while Heeyeon is learning to read music sheets, memorizing all of Super Junior's songs especially Yesung's lines.

"Hey, ijen geuman naege wahjooleh,

Jeongmal michil gutman gata, yeah..."

At Heeyeon’s request, Heerin went to the living room and continued singing ‘Sorry Sorry’.

"Nan neoman saranghago shipeo, jeoldae haneun pahl saenggak eobseo, hey, hey, hey!"

"God, I really have to continue singing for my unnie's request," she blurted, sighing.

"Rin, dance with me," JaeEun called out, racing to the steps of Neorago.

"Now, I have to dance?" she asked, too far gone from her friends’ hyperactiveness "Alright!” She ran towards the latter and danced to the chorus.

"Here's my favorite part!" JaeEun said, excited. "Hyuk's hot pumping!"

"Oh, oh only for you...oh oh only for you.”  The two copied exactly the one shown in the video.

"Encore!" Heeyeon and Raseul chanted.

"Wow, I’m so in demand!" Heerin blurted, wiping off her sweat all over her face and neck.

"Rinnie, help me!" the three girls, pleaded at once.

"Again?" she complained, already worn out. "Give me a break, gals."

"You have five minutes.”

"WHAT THE?!"