Three years have passed since dungeons abruptly began appearing on Earth.

Initially, there was widespread confusion regarding this strange phenomenon, but people eventually adapted, and the number of individuals earning a living from dungeons grew.

These include adventurers who defeat monsters, conquer dungeons, and acquire treasures; operators who manage and administer conquered dungeons; and streamers who live-stream their expeditions inside dungeons.

As I entered my second year of high school, I decided to try my hand at dungeon streaming—or whatever it's called—to earn some pocket money.

What I never imagined at the time, however, was that in what should have been a low-difficulty dungeon, an ultra-rare monster was lurking, and I would end up rescuing an incredibly beautiful adventurer girl from its attack.

And so, I began dungeon streaming alongside the high school adventurer, Hikaru Kurise, gradually rising to fame——.