A dungeon suddenly appears in modern Japan.

The protagonist, who had ventured inside, found himself trapped for twenty-five long years.

While attempting to escape, he coincidentally saves a popular streamer girl, and with her help, he finally returns to the surface.

In twenty-five years, the world surrounding dungeons has drastically changed.

Drastically stricter laws, and so many things he's lost due to his twenty-five-year disappearance.

Societal norms he's forgotten after years of living in the wild.

And the streaming world he's suddenly thrust into.

This is not the story of a hero or a popular figure,

But of an ordinary human protagonist, easily swayed by his environment, who survives and once again wages fierce battles within the dungeon.

Cross-posted from Kakuyomu. Also available on Nobepla.

The print edition will be released by HJ Bunko on March 1st.