At the beginning it seemed promising. The juxtaposition between the cute (and amateurish) art style and the unsettling weird atmosphere could work to create a cool supernatural horror-esque mystery story. The chemistry between the two main characters was fine, something reminiscent of Nagatoro-san. However after the reveal of Sawada's past it was beyond redeemable. Seriously it was hilarious. One of the few times I've gotten frustrated and at the same time laughed my ass off at how stupid, angsty, and pathetic a character can get. It's like something a 13-year old wrote when their mom took away their Xbox. There's also a hint of romancesprinkled into the story which would be interesting but nothing is expanded upon from it.
After that point the story loses all of it's steam and initial tension from it's setup and turns from a mystery to an adventure story which doesn't work since the world is without any depth or characters.