He is clearly making yw uncomfortable and he knows it and doesn't stop. It's clear yw has told him not to barge into his place unannounced and he still does it. It's clear a lack of respect for yw's boundaries that has been going on for a while. He's also sexually harassing yw every chance he gets and then it's passed off as a joke when it's not. He is weird. He is becoming a weird old man quite literally.
Wdym he didn’t do anything wrong… did you forget the fact that he’s only nice to MC and not anyone else? He’s a literal PIMP. He manages the company that the actor that has a crush on MC, is under. He pushes for that actor to use his body for the sponsor. He didn’t give af about that actor’s well being.
Not only that. It's relatable to so many girls and women how some men pretend to be friends then start throwing sexual advances and making you uncomfortable and using the proximity of friendship to continue being weirdos. He is doing that and that's why young probably quit his company cz he doesn't want to encourage it without killing their relationship entirely.

Why is everyone on Taegu neck like this? Apart from the age gap he didn't do anything wrong until now.