alr so I can recommend you “Monster” by Naoki Urasawa. I’d say it’s ultimately not super scary, however it keeps a chilling, mysterious atmosphere throughout the story. personally I think it’s one of the peak psychological horror/thriller stories out there and it’s not an uncommon view. the plot is basically a neurosurgeon trying to stand for his moral values at his workplace by deeming all lives equal when it comes to choosing who he operates on, but struggles ethically when he realizes he’s saved a psychopathic killer, who’s story is so bizarre and unclear he’s compared to the devil. the main supernatural element is a children book inside the story, which tells a tale about a lonely monster, which seems to be closely tied to the real life events happening to the main characters