Gibiate

In the year 2030, Japan, a virus called "Gibia" has spread throughout the world, turning people into various monsters depending on their age, sex, and race. A trio of early Edo era characters—a warrior, a ninja, and a monk—travel through time and land in a devastated Japan. They support a professor who is researching a virus cure while enduring Gibias' constant onslaught. They set out on the perilous quest to find other survivors, where they will encounter not only creatures but also bandits who will attack them in order to steal their food.