You've always imagined it.

What had happened if your favorite video game, anime, or Hell, even so much as movie characters all somehow lived in the same world?

Well, it's happened.

Barriers, walls, or whatever you want to call them, they started to fail. In some catastrophic, apocalyptic event...
No one was really sure what happened.

Some say it was a bright light. Others, an earthquake. But the results were the same. The worlds merged.

No one knows why. They just did.

One minute, you could meet Dante from Devil May Cry, next it could be Greil from Kuroshitsuji.

What will happen to everyone?

We don't know.

But... That's the fun of it.