A kid infected with an unstoppable bioweapon runs with a girl he barely knows while his own body becomes a weapon he can't fully control. The OVA burns through seventy minutes like it's being hunted, every scene another mutation, another impossibility, another reason Ikuroo should already be dead. Araki's proto-JoJo energy is all over this: body horror that doesn't exist to disgust you, it exists because the protagonist's survival IS the transformation happening in real-time. The animation catches a very specific moment in late-80s OVA culture where ambition and budget collided and nobody cared about explaining the science. Watch it once at full volume and it's done with you before you can ask what you just saw.

A secret organization called Doress has backed the creation of BAOH, a genetically engineered parasite that turns its host into a nearly indestructible organism able to reshape its body to meet any danger. Their first human test subject, a young man named Ikuroo, carries the parasite in his brain. While he is being moved by train, Sumire, a psychic girl held by Doress for her precognitive gift, sets him free, and the two escape together. Doress must find and destroy Ikuroo before BAOH fully manifests, and the mad scientist Dr. Kasuminome sends superpowered agents and a small army after them. This one-episode OVA mixes action and science fiction.