あらすじ
The manga centers on Jack, a middle-aged freight company employee, who suddenly becomes the key to defeating the demon king, when he is told that he is blessed with the strength of a legendary swordsman. He then decides to become an invincible swordsman as a side job.
あらすじはAniListより（英語）。
データベース内の関連マンガ
自社カタログから選出 — 同じ作者、またはジャンルの重なり。