This one moves like a nightmare you can't quite remember when you wake up. A single OVA from 1998 that builds an entire mythic underworld of cosmic horror, Ogres as ancient parasites, Guardians as the last line, humans caught in the middle of a war they don't even know is happening. The scope is insane for something that short, and the creature design has weight to it, the kind of visceral grotesque that sticks because it doesn't explain itself. Expects you to sit with dread instead of comfort. You either surrender to the weirdness or you bounce off it immediately, there's no middle ground with something this compressed and confident about what it wants you to feel.
In Neo-Shinjuku 2089, humanity believes it has conquered the world. Skyscrapers rise above the neon-soaked streets while people move through their daily lives unaware of the darkness lurking beneath their feet. But the city harbors a terrible secret: an ancient Ogre, a being of immense power that once ruled the planet through fear and domination, still draws breath in the shadows. For millennia, these grotesque immortals held humanity in chains while a select few Guardians fought to preserve free will. Most have faded into history, their struggle forgotten. Now, as the last Ogre awakens from centuries of slumber, it begins orchestrating a plan to reclaim its dominion over mankind. What starts as isolated disappearances and unexplained deaths becomes a nightmare scenario: the systematic enslavement of an entire species. A handful of people, caught between ignorance and horrifying truth, must confront what lurks beneath the city before humanity's brief period of freedom ends forever. Time is running out.