Noah, the world's strongest six-year-old, holds the fortunate position of being the Thirteenth Prince of the emperor. Born with an infinite level cap and a cheat skill that allows him to add the abilities of those he commands to his own, he is unmatched. Reincarnated into a noble family, Noah thrives in an environment enriched with exceptional education and abundant resources, allowing his talents to blossom. However, behind the glamorous facade of aristocratic society lurks a world of conspiracies and power struggles.

The fire extinguishing samurai who stopped the great fire was called "The fire-eating bird". Matsunaga Gengo, once known as the "Fire-eating Bird", was the best fire-fighting samurai in Edo. He had resigned from the fire brigade for a reason but suddenly received an invitation to serve in the Shinjo clan. The Shinjo clan's fire-fighting team had no money and no personnel and was looked down upon by those around them. With the encouragement of his wife, Miyuki, Gengo decides to rebuild the collapsed fire-fighting clan as its chairman. Gengo and his friends, all of whom have their own peculiarities, struggle to "save any life", despite being ridiculed as "ragged steeplejacks"(= the 'Boro-Tobi-Gumi'.), In Edo, a mysterious series of suspicious fires called "foxfires" continue.

In the Disabled Elderly Village, there live nine elderly people with unpredictable origins and the young man Qin Mu they raised. One day, the cows that Qin Mu was responsible for grazing began to speak human words. From then on, Qin Mu became more aware of the dangers and beauty of Daxu, a land abandoned by gods: demons descended with darkness, divine bones danced in the ruins, and dragon bones protected their young, a giant ship that drags the sun... No matter what kind of danger he faces, Qin Mu is fearless. He has integrated the skills passed down by the Nine Elders and vowed to carve out a world with his unparalleled hegemony.