He should have passed away peacefully of old age, but somehow he’s been reincarnated into a Japan-like world full of dungeons!!

Here, humanity’s living spaces are under constant threat from the dungeons. Naturally, the reincarnated Akihiro isn’t about to set out to conquer dungeons and become a hero. Instead, he heads into the dungeons to make money for a very specific goal: to buy up beef, a luxury item in this world, and eat his fill of yakiniku to his heart’s content.