Have you ever heard of The child who is an adult? Well Johnny Wellington was a child who at the age of 2 had the mental capacity of an adult. The government decided to teach him in the ways of an assassin to fight off the SPIRITS who invaded Earth a milienia ago but has decided to take action now. He is now trained in the ways of ending these SPIRITS, but there aren't just SPIRITS invading Earth. Now Johnny has to become the MC of a story in saving humanity and a bunch of other races.