0 - Remember your past

Reincarnating into another world filled with concepts that were once nothing more than fiction to you, you're surprised to learn that you're not the only one with memories of a past life. Even more when you learn the world you previously lived in differed from his in many ways.

'I saw the back of the man who stood at the center of the universe in the distance, lonesome and burdened. For he, a man who bore the weight of the world, I've since then swore to stand by him.'

"Come on now, as fellow reincarnators, let's get along, shall we?"