
I'm a little late about this but all this time i thought it was Sangwoo's father who was the reason why he became how he is now and that his mother was a victim but guess I was wrong...?

Yeah I used to think it was both parents that had to do with why Sangwoo become the way he is but I'm starting to think that its just the mom. I don't know if in the beginning of the series where it could have been one of the mom's lovers that had been abusing them and dad could had been dead already by than. Because I have seen no signs of the dad being abusive. He seems like a good hardworking dad for the most part. But hopefully we'll get to see the what really happened in Sangwoo's past because I'm just really confused right now.

Remember when Hyesung eventually decided to check on his baby but wasn't able to because he overheard Dojin and Heesu talking instead? Then later when he disappeared, Dojin checked the security cams ....so was Dojin able to see Hyesung making his way to the neonatal unit coz then he'd realized that his son's mother did care...

So i was rereading this from the start and on chapter 7, when Dojin and Heesu were looking for Hyesung who was scammed into thinking he can become an alpha, Dojin was able to locate him just by scent even though they weren't at near proximity but are in the same area.
http://www.mangago.zone/read-manga/love_is_an_illusion/uu/tr_chapter-7/pg-13/
I hope he'll be able to locate Hyesung soon!!! ╥﹏╥
I was actually half hoping that a ghost does haunts the apartment....but then having a fujoshi brain, of course I'd think otherwise about who and what made all those noise *smirk*