considering that he knew chaejun, maybe he knows the history of chaejun's personality when he was a kid and for that reason, he's being extra protective (or something) but still his brother's old enough why do he have to always bother them
considering that he knew chaejun, maybe he knows the history of chaejun's personality when he was a kid and for that reason, he's being extra protective (or something) but still his brother's old enough why do ... Axis
He can be protective but he's just being creepy at the moment
Does he have a brother complex or something