Nakaya Ika

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.

Muzicato Kanki, who possesses the power of music, and Franz, an ordinary human soldier. The two, who don't get along at all, each have their own thoughts in their hearts as they face off against the disaster-bringing entity "D2"...