The Returned

We all know of people that are sent to the another world to be some great hero, get the girl and save the day in the end right?

But what if the world the hero was sent to was not happy go lucky world where the hero would have a harem and kill the demon king in the end, what if the world was dark and bloody filled with hatred and malice on all sides.

And what if the hero becomes something else in order to survive in that kind of world?

And what happens when that kind of hero returns home?

Well, let's see.