Dungeons suddenly appears in modern-day Japan.

The protagonist, who dives into them, ends up trapped inside for 25 whole years.

While trying to escape, he happens to save a popular streamer girl, who in turn helps him make it back to the surface.

But a lot can change in 25 years.

Harsh new laws.

Countless things lost after vanishing for so long.

Common sense forgotten after years of surviving in the wild.

And now, without warning, he’s thrown into the world of streaming.

This is the story of a man who isn’t a hero or a celebrity—

just a regular person who easily gets swept up by his surroundings—

as he returns from the abyss… and dives once more into fierce battles within the dungeon.

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