Nahuse 
Rebuild World (Manga) Volume 5 [EPUB ebook] 

Sporting a new motorbike and an upgraded arsenal, Akira is ready to tackle ruins more distant than Kuzusuhara. The long-abandoned town he comes to is supposedly safe, but you can’t trust everything you hear—and he isn’t the only relic hunter looking to test his mettle on its streets. Before his expedition is over, Akira finds himself dodging would-be rivals and contending with colossal beasts. And when his training leads him underground, beneath an unassuming building, he discovers an ancient threat like none he’s ever faced before.

Meanwhile, Katsuya and his team are in for an ordeal of their own. The young hunter is desperate for recognition as a full-fledged member of his syndicate, and he’ll run any risk—or strike any deal—to earn it. But even if Katsuya lives long enough to achieve his dream, it may cost him more than he bargained for.