Jongup has a serious crush on his pain in the brother's best friend. 

Youngjae is a nerd, he loves studying, he is silent, he doesn't have friends and he's always neat. One day a new student comes to his class, Moon Jongup, he's exactly the opposite, but he's a good guy with many and big feeling for Youngjae. Will Youngjae accept a guy like Jongup?

Dae Hyun talks to Young Jae about how Jong Up’s tolerance for physical affection has gotten better and proudly pins it on his "exposure therapy" method. Young Jae knows better, but he’ll let Dae Hyun have this victory.

Finally it dawns on him, and Jongup can't help but laugh at his own stupidity. IT WAS SO OBVIOUS!!

Short drabble I posted on tumblr^^

      When Jongup wanted Youngjae's attention.       “Hyung!”     “Yes?”     “Hyung!”