Youngjae was once one of the main singers for his school's choir club, but due to his laziness to attend the practice his postion got replaced by the new transferred kid from Busan who he never saw before. That new kid happened to be someone so loud, annoying, and won't stop talking about his Sam Tsui addiction and Youngjae disliked him even before they became friends.

Whenever the new kid came and trying to talk to him, Youngjae would always plug his earphones and raise the volume of his phone or at one point, even covering his ears while saying la la, la la la la la la la la la la.