A young Japanese boy sees his life in Neo Tokyo abruptly end in a surprise attack by alien forces, only to awaken as a Boss within a game world; The powerful Archduke, Arthur Pendragon von Draco Silva. Completely confused, he suddenly receives the "Master System"....a strange immaterial technology capable of summoning fictional characters as an imitation of incarnated servants! Loaded with this power and joined by capable and loyal subordinates, Shiragaki Sora, now Arthur, will defy the original narrative causality. and will look for a happy ending for everything.