Inyouchuu Shoku

Demon hunters Mikoto, Sui, and Takeru are sent to investigate a remote island where a string of disappearances has been linked to dark yoma suspected as the cause. They arrive expecting a straightforward investigation — the kind of island breeze and ocean air that almost makes you forget why you're there. Then things go sideways fast. What starts as a seemingly peaceful setting peels back to reveal something far more sinister lurking underneath, and the team finds themselves deep in a supernatural nightmare they weren't fully prepared for. This is a single OVA compiled from two episodes plus bonus footage, adapted from the visual novel source material by Anime Antenna Iinkai. The horror atmosphere is genuinely unsettling — the soundtrack does a lot of heavy lifting to keep tension in the room, and the demon-hunting mechanics have enough internal logic to feel grounded rather than arbitrary. The animation leans hard into the horror elements, which works in its favor. If you've watched things like La Blue Girl or Demon Beast Invasion and want something in that same supernatural horror space with a mythology-tinged backdrop, this scratches a similar itch. It doesn't overstay its welcome at a single entry, so the pacing stays tight. Fair warning going in: this is Hentai-categorized content with genuine horror underpinnings, not the other way around. The dark tone is consistent throughout and doesn't soften.