A wanderer perhaps
After dying to save a child, a man finds himself in an endless void with no body, no purpose, and no memory of who he was. Eons pass in the emptiness until, bored out of his mind, he decides to explore different worlds—worlds from manga, novels, and shows he once knew.
Adopting various personas—a blind swordsman, a powerful ninja, a mysterious magician—he steps into these worlds to see what happens. With his god-like powers, he doesn’t change their fates or save the day. Instead, he just stirs things up, looking for something to keep him entertained, something to remind him of what it means to be alive again.
But deep down, he wonders: will he ever find a real reason to keep wandering?