HELLO WTF WAS THIS CHAPTER ??? Ref do something they’re all going insane

Can someone explain to me WWHHYYYY is the professor fucking w them?? Like what is this grown ass man problem?? he does not genuinely care for the wooju and does not want him like that so I’m baffled why he’s doing all this crap

Someone said in the comments that the professor is the friend's half brother, but i don't know if that's true or not