Mars was supposed to be humanity's blank check. Instead, the terraforming accidentally created something that hunts like it has been waiting for us the whole time. The second expedition doesn't know what killed the first, and neither do you until the moment the camera finds a cockroach the size of a man. Body horror and survival merge without apology. This OVA doesn't waste time on exposition or mercy. The Bugs 2 arc commits to the specific cruelty of being outmatched on alien soil by something that shouldn't exist, something that turns the human body into a weapon it can use against you. Watch this if you want your sci-fi action with genuine dread underneath. It costs two episodes and leaves you knowing exactly why Mars stayed empty for so long.

In the late 26th century, an overcrowded Earth has spent centuries terraforming Mars, and colonizing it would be a historic step for humanity. The first crewed mission to the planet was lost. Now a second expedition arrives, ready to wipe out the cockroaches that were used to reshape the Martian environment. The crew is shocked to find the insects have mutated into huge, hostile humanoids bent on killing every human. These explorers, however, have each gone through the Bugs Procedure, a frightening experimental surgery meant to push them beyond human limits. The two-episode OVA adapts the manga's Bugs 2 arc as sci-fi horror and action.