Gachiakuta manga volume 4 features story and art by Kei Urana.

In the middle of the battle with the Raiders, Rudo finally awakened his abilities. He has the power to find the worth in objects and draw it out to its full potential! After driving back the Raiders, one of them revealed Rudo's vital instrument is actually part of a series, as well as the existence of a “border” connecting the Sphere and the ground. Now that Rudo has a clue to returning home, he sets out to solve this brand-new mystery. But many dangers lie ahead…