In a city of the dead, long since ruined and far from human civilization, lives a single human child. His name is Will, and he's being raised by three undead: the hearty skeletal warrior, Blood; the graceful mummified priestess, Mary; and the crotchety spectral sorcerer, Gus. The three pour love into the boy, and teach him all they know. But one day, Will starts to wonder: "Who am I?"
Will must unravel the mysteries of this faraway dead man's land, and unearth the secret pasts of the undead. He must learn the love and mercy of the good gods, and the bigotry and madness of the bad. And when he knows it all, the boy will take his first step on the path to becoming a Paladin.
In 2061, Japan is under a state of occupation by multiple states. The world, including Japan, has been consolidated under the rule of four trade blocs. The entire archipelago is now the frontline of conflict. The Japanese people live under a state of constant occupation and oppression, with humanoid war machines called AMAIM patrolling its streets. A young introverted boy named Amō Shiiba has a chance meeting with the autonomous AI Gai, and his acquisition of the AMAIM Kenbu begins a story that will see him attempting to take back Japan. Gashin Tezuka is a reticent and frank 16-year-old member of the Japanese resistance who pilots the AMAIM Ghost to avenge his father.
A century has passed since King Kyle of the Orvelia kingdom destroyed the fierce demon lord Angmund, restoring peace to the lands. Now in a time of peace, the apprentice knight Kasel enjoys his life without worry. His fate begins to change, however, with news of demon appearances infesting the neighborhood. Guided by a wise man, Kasel finds friends he can rely on and sets off on his mission to seek a holy sword, capable of slaying his newfound enemies.