Bible Black

While exploring his school's abandoned basement, high school kid Taki Minase stumbles onto something he really shouldn't have — a blood-stained grimoire called the Black Bible, left behind from a violent occult incident twelve years ago. That discovery kicks off a slow-burn horror story set almost entirely within the walls of what looks like an ordinary academy, where a hidden coven is running rituals in the dark and the school doctor, Rika Shiraki, is far more dangerous than she appears. The story pulls in his childhood friend Reika Kitami and a mysterious classmate named Kurumi Imari, weaving a web of psychological manipulation and factional power struggles that genuinely keeps you guessing about who's pulling whose strings. Don't go in expecting a simple premise — there's actual world-building here, an oppressive gothic atmosphere, and a moody early 2000s art style that fits the tone. If you've seen Urotsukidouji: Legend of the Overfiend and appreciated how it blended horror with adult content, Bible Black scratches a similar itch with a more grounded, school-based mystery framing. Fans of Euphoria who stuck around for the psychological tension will find familiar ground here. It's a 6-episode OVA from Studio Jam, based on a visual novel, and it earns its reputation as one of the more narratively coherent entries in its genre — which, given the genre, is saying something.