No. His mannerisms are actually very normal with Korean men. Most of them tend to feel anxious around their seniors and try to be really polite, so they seem uncomfortable. Also Korean celebrities especially idols, they are so used to having their hair fixed all the time so it kinda bothers them when they let their hair down.
Oh i see. Thanks for the reply. I really like his acting on the kdramas especially Destined with you. I haven’t seen him on variety shows like this. That is why probably I am not used to see his natural self.