Turning Evil Made Me the Supreme Celestial Venerable

One day, an overworked office drone was suddenly possessed by a System and gained the ability to draw on his strength in bursts.

From then on, he taught his female boss a lesson, squeezed his male executives dry, won over the company's big boss, and mastered the workplace.

He rose to the pinnacle of life, strayed ever further down the path of corruption, and ultimately became the Supreme Celestial Venerable.