A loser otaku, killed in a freak accident finds himself in a strange but familiar world. His adventures take him dimension after dimension to find his way home to his own body.

Along the way, he unwittingly becomes the ruler of all the dimensions he traverses to.

This is the story of the Otaku Emperor

Note: This story does assume you know most of the characters and storylines of the individual mangas this story is a fanfic of. However, if you don't, I've tried to make the story cohesive enough to understand anyway.