Japan in the dawn of a fantasy era, where dungeons have appeared.

Levels, skills, and magic have manifested in the world, and the magic stones brought from dungeons have rapidly spread across the globe as a new energy resource with exceptionally high power generation efficiency.

The world is undergoing transformation on an unprecedented scale and at an unprecedented speed.

The protagonist, Takeo Samejima, driven by his desire to level up in real life, spent all three years of high school preparing for it. The moment he graduated, he chose neither higher education nor employment, and instead became an explorer.

Takeo is wholly devoted to raising his level.

However, the conflicts of this new era do not allow the contradictory existence of “just an ordinary person with a high level” to go unnoticed. Because he has gained power, Takeo finds himself drawn into a series of incidents—

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