I skimmed through the last 2 pages due to trauma.
But looking at the comments, I can guess that Hye-sung's dad came looking for him after seeing him on the media? That's awful. He should've never went anywhere near Hye-sung or his family. Hye-sung left for a reason, and the dad should obviously be aware of that. So i'm guessing that now since he's rich and with a "big shot alpha" He's trying to get something out of Hye-sung... It could be money, fame, or maybe he just feels entitled to Hye-sungs life. Either way, the dad is shit.
The ending was a little heavy but not to where it ruins the plot. I love the creepy characters and how everything flowed beforehand. I'm especially in awe of the unique detailing there was in each room! Very appealing.