Sungchan was a big bully, especially to Shotaro. He would tease him, make fun of him, bully him but never anything physical. And Sungchan, IS PHYSICAL. He actually has a secret crush on Shotaro and he doesn’t know how to express it to him, so he makes fun of him. The others? He bullies them because he can. “Hey shortie, grew any taller?” He smirked.