Goodbye; Hyukjae's mind is in turmoil over his impending enlistment. Dancing doesn't help. 

The members are leaving him one by one and Ryeowook doesn't want to be alone with his memories in the emptiness of the Super Junior dorms. That, and a bunch of other problems he's facing. Donghae is involved.

They left all they knew to come to Korea. They trained so hard to become a popstar. They missed all they had, but they grit their teeth to carry on trying. They shed tears, they fell sick, but they carried on. They did it. All for nothing, because what did they get? Less than before. They received hatred and shrieks, and little love. They received antis. All in return for entering a new life and trying so hard. All that time, Henry and Zhoumi have tried laughing it off, apologising