The story of an emergency room doctor who dies from overwork and is reincarnated in a different world. The Age of Sail has already begun, but the steam engine has yet to start roaring. The Radiant Lord's glory shines upon the continent, and across the sea, the gods' church and mages support the royal power on the island nation. Dwarves walk freely in the kingdom's cities, and the legends of werewolves, vampires, elves, and dragons have never faded. Wu Zhou, the overworked emergency room doctor, finds himself in this era, reincarnated as the city guard youth, Great. Comrade: It's bad! The captain is severely injured, his intestines are spilling out! Great: Help me up, I can still sew! Great: Close the wound. Comrade: ...What? Great: ...Give me a minor healing spell, ...