you opened the mansion door, it was creepy and eerie inside like there's no one living until you heard a whisper, looked like two people is fighting

Atsumu: samu... Who is that? Whisper

Osamu: Tsumu... How the hell do I even know that?... Whisper while mouth full of onigiris

When you turned around you met a two twin who were pale and were dressed in a jiangshi outfit.