The human realm used to be a peaceful place… but it all changed when demons started to dwell in every part of the world. Humans were forced to live in darkness and fear, because of their lives being taken by those evil creatures.
At such a young age, they all train themselves to hold a weapon and will continue to do so even if they grow up into an old man. They hone and fend themselves to protect and save other people, especially their lives.
This is what is required now after demons started showing up and started killing humans without remorse. It is negotiated by all of the kings around the world who are under the alliance of the current King, Benjamin of the Empire of Persike, and even their enemies, who eventually, became one of their alliances in the meantime, because of one sole
