Overlord: The-Demon-Who-Lived?

A practical joke left behind by his dear friends has left Momonga with a body, now he has to deal with the fact he is in a new yet, familiar world where people seem to mistake him for someone he is not. A supposedly, Boy-Who-Lived, who disappeared many years ago. Now, Momonga has to deal with crazy people, depressed family members, obsessed guardians, and a rather angry Dark Lord.