In a world where defeating monsters within the labyrinth granted an enigmatic power and knowledge called "Mana" (true name), Dennis, a nobleman's son, was born into a poverty-stricken life that was far from noble.... more>>

Being the second son and ineligible to inherit the territory, Dennis embarks on a journey into the labyrinth, seeking to acquire the "Mana" ability and ensure his survival.

Simultaneously, in Japan, a man named Masaya discovers a profound connection to Dennis's consciousness through his dreams. When Dennis acquired a "Mana" ability, Masaya was astonished to discover that he could also wield the incredible power of this "Mana".

Not only Masaya, but people all around the world started awakening to their ability to use the "Mana", sparking the curiosity of nations worldwide.

Dennis, in the other world, undertakes the task of managing his territory, skillfully incorporating the knowledge of Earth's scientific advancements imparted by Masaya. Meanwhile, Masaya himself flourishes as an entrepreneur, fully using the incredible power of the "Mana"(true name).

This is a tale of their extraordinary accomplishments in their respective worlds as they ascend to unparalleled heights. <<less

One day, the Earth's axis tilted slightly, causing drastic climate changes that resulted in the submergence of continents and islands while new land emerged. The... more>> surviving Japanese people settled on the newly formed islands created by undersea uplifts, where powerful feudal lords vied for supremacy in a manner reminiscent of the Sengoku (warring states) period. The protagonist, Minazuki, was born as the son of a feudal lord and began his journey to become the supreme ruler. <<less