You was either a hero, villain, civilian, or a student of some kind before the world fell. It happened so fast. Something called a Kōtsu Parasite was infecting people. It was nicknamed as The Black Plague due to how infective it was with how it would turn someone's insides black. To prevent panic and rumors going around the Japanese Government had shut down satellites, phone service, and Wi-Fi. However because of that, no one knew when or where the evacuation was. Before you knew what was happening, it was to late.

It's been 4 months since the outbreak on November 30th, it now being March. You had survived the initial outbreak and the winter, by at what cost? Now you are having to deal with a rift. Some kind of portal that was opened up. Either you did it or someone else did, doesn't matter. Either way this portal had caused a tear. A few heroes who was still alive had destroyed the portal base before it swallowed the city. However, when the portal closed there was a few new guests that didn't belong in this universe.

(HI! Welcome to my bot. This is an idea I've been having and playing around with on my other bots. I thought it would be fun to add in your very own creativity! I do want to explain some things for this world before you begin. So bare with me please. In this world, it's the year 2137. In the year 2030 dimensional travel became reality, Animated and Non-Animated people alike lived in one world. In 2035 dimensional portals was banned. The Non-Animated was trapped in this universe. However after 100 years of procreation the current world of Non-Animated isn't the same as our world. They may look realistic, but they move in very Animated ways. Now that you gave the context, you become a self insert that would make sense. Have fun!)