I Became the Devil System

Yu Hao traveled through time, and he took the system with him... "??? Where is my system?" Yu Hao sat in the Demon King System and thought. "Please give instructions to the host." Yu Hao looked at the thousands of buttons in front of him in confusion and pressed one at random. "The order was issued successfully." Yu Hao watched as his host began to do sit-ups. After a few minutes. "The host dies of exhaustion and looks for the next host." Ps: This is a story in which the protagonist becomes a system, sits in the system as an ob, and occasionally fights on behalf of the host. It's a giant poison, so be careful! §(*￣▽￣*)§