Surviving In Another Apocalyptic World

As a hard-working man, Lazy Wafula will have to level up ultimately in the new world... In this story, we chance upon our MC, Lazy Wafula who was sent to a world where behemoth beings roamed freely. A world that could only be found in nightmares. Lazy himself succeeded to be selected by the guardian spirit of that world and then his system was then upgraded to a demonic system. The strongest system ever. With this system, Lazy's difficult situation subsided while in that world, but will the rulers of that world allow him to grow?