Confirmed

DMcKen May 18, 2021 8:39 am

My suspicions have been confirmed. Duke for sure is the killer. I think they mentioned the victims probably being drugged to listen to whatever the persons says. I could be wrong, maybe that was from some true crime documentary. But I feel like this webtoon had it.
Anyhoo, point is. In the flashback Louis was acting drugged. He just said yes and blindly followed whatever was said to him. And the the Duke was the one with him in that state before the prince snatched him. So, he has to be the killer.

Responses
    jy-sama May 18, 2021 9:04 am

    this makes sense oml

    Mari May 18, 2021 11:14 am

    This is my theory too

    meyrin May 18, 2021 12:48 pm

    No wonder Louis got confused when even the duke at night with him too before real motel incident happened.