Soeun - Chapter 75

Firat off I dont understand why lia actually likes jonghoon. Second, this dude is going through a situation of his own creation mind you and now he is seeing problems with it now. This story make me the authors endgame. Like its clear lia likes him and she might try to take him from soeun.But the other guy like lia and now they are gonna start some swapping relationship or potential cuck the other dude all together. To be honest he isn't even a bad character to me he is more likeable than jonghoon who is an active cuck even now.I guess my real question would be why is it bothering him even though he started soeun down this path in the previous story?