Nahuse 
Rebuild World (Manga) Volume 3 [EPUB ebook] 

When a pair of ambitious arms dealers lead a horde of ravenous monsters into Akira’s usual hunting grounds, his routine training in the wasteland turns into a fight for survival. And with no time to run and nowhere to hide, the young relic hunter needs all the help he can get. But can even the reckless merchants’ firepower and the ghostly Alpha’s expert guidance see him through this onslaught alive? As wave after wave of mutant creatures wear down his defenses, it becomes clear that only a miracle can save him.

And if the beasts of the wasteland don’t kill Akira, the people of his home city just might. After he takes a fledgling gang leader under his wing, he finds himself in the crosshairs of syndicate underlings hoping to climb the ranks, not to mention rival bosses looking to expand their territory. He’s already proven that he can handle himself in a fight; now he’ll need to prove himself as a negotiator if he ever wants to walk the streets in peace again.