Catblade

Once a war machine, now a freelance paranormal investigator, Kenichi visits Mars on a desperate quest to pay rent, only to find a dying runaway vampire lying on a pool of her own blood. Against all logic, he jumps into the flames of a conspiracy spreading across the red planet. Witches, assassins, and corporate mobsters turn the hunters into prey, and when Kenichi's past joins the hunt, he realizes he dragged in more than he can chew. Armed with his trusty sword, his cat companion, and a sturdy cyborg body, he joins forces with the mysterious vampire to fight the horde of enemies chasing them across the planet.

At the heart of their troubles lay a secret society composed of powerful corporations and underworld crimelords, and they do not appreciate an outsider meddling in their business. The balance supported by the Stagnant Century crumbles as the cyborg and the vampire kick the first domino down, sending a chain reaction capable of transforming the twin planets forevermore.

The price of peace was etched in blood and never repaid. War returns, and it charges a high interests.