@UNKNOWN U are basically saying the same thing. It is an issue with communication. Yeol has already expressed to Kang Joon than he doesn't care but Kang Joon is still worried. But if he doesn't talk to Yeol about it then he's not going to get the reassurance or confidence he needs to no longer be self conscious. Therefore it is a communication issue because it's not like Yeol knows that this is troubling Kang Joon.