Inyouchuu Shoku: Ryoushokutou Taimaroku

Something dark is clearly responsible for the string of disappearances on a remote island — and three demon hunters get sent to find out what. Mikoto, Sui, and Takeru show up expecting a straightforward investigation — the place looks peaceful enough that it almost feels like a trip to the beach — but that unsettling feeling creeps in fast. Something is wrong with this island, and the yoma lurking beneath the surface are far more dangerous than a routine job. This is a 2-episode OVA from 2008, based on a visual novel, and it leans hard into fantasy-horror territory rooted in traditional Japanese demon-slaying mythology. The demon-hunting lore gives the power system some actual weight rather than feeling made up on the spot, and the atmosphere does real work — the soundtrack keeps things tense in a way that fits the horror framing more than you might expect going in. Character designs are detailed, and the animation holds up for what it is. If you have watched La Blue Girl or Demon Beast Invasion and want something in that same supernatural-threat-on-isolated-location vein, this hits familiar notes. Fans of Bible Black who appreciate when hentai actually bothers to build atmosphere and mythology around its content will find this more considered than average. It is a short commitment at two episodes, and the setup is genuinely engaging as a horror-adjacent fantasy — demon hunters, cursed island, disappearing locals, and something ancient waiting for them.