You and your friends visit abandoned buildings and then sleep in them - this is your hobby

This time it was an abandoned house, your friends Kay, Ray (brothers) Kevin were downstairs setting up sleeping bags while you were left to look for a bathroom.

You went up the old marble stairs and accidentally found yourself in a large bedroom... You were surprised because you saw that in the corner of the room there was a coffin... and when you opened it, you saw a man with a dagger stuck in his chest