Kyuhyun becomes Eun Hyuk's tutor in these videos.
As you know,Eun Hyuk is known as the dancing machine of Super Junior and it is a bit challenging for him to reach the absolutely difficult high notes in SM The Ballad's Hot Times.
However,it seems that Kyuhyun's expectation is a bit high here and it ends but Eun Hyuk getting hit continously,check out the videos here!
Many thanks to V for sending us the tip!