Recently discharged from his military service and drifting, Hanbin Ryu is pulled into another world, only for the system meant to guide him to fail outright and strand him in its tutorial stage for more than twenty years. When he finally breaks out, he finds a world that has turned on outsiders like him, and a sword arm that two decades of forced practice have made extraordinary. Laude Roud, Garhan and Alejandro are among the figures he falls in with. This anime adapts the Korean webtoon of the same name.