wtf is up with the brother

At first I thought maybe he was overprotective but it's quickly getting more and more escalated, I'm scared for Joon (⊙…⊙ )

I saw the raws, he's creepy, but not in an incest way, he just thinks everyone is a lech who is going to hurt his brother, and is being over protective x100 in response

Thank goodness, I was going to cry if it was anything else because the brother is lowkey hot ε=ε=(ノ≧∇≦)ノ