For a first episode this is a great hook. I like how Haruka isn't gullible and has a sharp observation, but whether she continues to be that is gonna be question. The pacing and visual is so good at setting the horror atmosphere without making it a gore, simply unsettling. It brought enough clues to the narrative that the audience can figure them out on their own. A show that allows you to question if the case is supernatural or not is certainly a plus. Plus, Haruka and Yakumo's starting dynamic ended with such wholesome note that betrays the tragic situation between them.