This becomes truer the longer the series runs too.
Kotori's whole vibe is "nostalgia" and while Haruka didn't start out that way, she eventually turns into the nostalgic idol for many.
Hopefully so, but I've read too many manhwa where I wished that was the case (that the child is not the bad parent's real child) only to have it to be otherwise.
Manhwa authors seems to get a kick out of making unredeemable parents.
It's funny to me that the thing that stood out the most in this chapter is how Samjang seems to know how to put on her seatbelt (and if she didn't, imagining him putting it on for her is cute)
It seems they'll just limbo the first floor until final stage or something, advancing a "stage" just change the layout or (funky theory I have here) advance the time period inside the mansion.
He's a brainwashed kid who's just immitating what his parents are doing and following what the servants praised him for, boy got no real bad bone in him and didn't do anything out of actual malice.
Boy deserves a second chance.