Naedoko Demon's Ground: Fallen Preg-Princess

After Lu Luu vanishes following a routine visit to the town castle, Eliza and her crew head out to find her. What starts as a straightforward search-and-rescue in a classic fantasy RPG setting turns into something far darker when they stumble upon a girl named Jard bound and in terrible shape. Turns out the Acklem knights — supposedly the law of this land — have been running a horrifying operation, capturing female adventurers and offering them to monsters. And now Eliza's group is on that list. This is a single-episode ONA adapted from an RPG game, so the world-building is light and the pacing moves fast. The character designs carry that familiar fantasy-adventurer aesthetic, and the dark betrayal angle — knights being the actual villains — gives it more narrative backbone than most entries in this space bother with. It leans hard into grim territory, no question, so go in knowing exactly what you're signing up for. If you've watched Kuroinu or Taimanin Asagi and you're looking for something in that same dark fantasy lane with a similar survival-horror tension, this fits that niche. It's not trying to be anything other than what it is — a short, bleak fantasy ONA that delivers on its premise without pretense. One episode, straightforward setup, does what it sets out to do.