You may find that the yokai this time is pretty much the same category on ep 3, although this one is pretty much rigid and malicious. Katsuya has a good character but did a foolish decision at the start. This is my hunch but something/someone is deliberately sabotaging some stuff, I don't have much of a proof but I can feel it 🤔. The episode isn't graphic considering the nature of the yokai and it was an entertaining yet thrilling watch.