
Probably the brothers entire existence, like is he the reason why everyone has been straying away from Hanjoo. His appearance legit changes from person to person as well (at the beginning sunbae didn’t perceive much of him meaning he was average in his physical appearance, but in the latest chapters currently he’s been appearing more handsome or how Hanjoo has first seen him as). I feel like the brother is actually a spirit that got attached to Hanjoo when he was alone. He probably liked the fact that Hanjoo was isolated from everyone else, so he intends to keep it this way by making sure everyone gets away from him (hence the whole hanjoos just weird) and trying to make him stay away from sunbae.
The more I read the more confused I become