Traveling Through the Devouring System of Another World

He was originally a fat house with nothing to do, but he unexpectedly traveled through time and space into the body of a good-for-nothing young master. I also got a plug-in-like system, so let's subvert this other world for me! Turning your hands over becomes clouds, turning over your hands becomes rain. Die as my enemy! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.