Gibiate

The story is set in Japan in the year 2030, where a deadly virus called "Gibia" has ravaged the planet, transforming the infected into monstrous creatures whose forms vary depending on age, gender, and race. A samurai and a ninja from the early Edo period are pulled through time and find themselves in this devastated future. They join forces with a professor who is desperately working on a cure for the virus. As they travel through the ruins of Japan, they battle hordes of Gibia monsters, ruthless outlaws, and other dangerous enemies in their mission to save humanity.