I Took the System with Me and Joined the Human Body Adjustment Office

Features of this book: science fiction style, apocalyptic writing, systematic writing, multiple elements, no rebirth, no time travel System capability: can control human endocrine and metabolism at will System scalability: The version can be continuously upgraded. In addition to basic abilities, people's senses and even brain waves can be controlled at will in the later stage. Highlights 1 and 2: Make money, and help big stars stay young forever; help international celebrities extend their lives; not to mention help chaebols to recuperate their bodies; and because of the scarcity of system capabilities, it has become a powerful immediate combat force... Wait, do you think these are free?