Scum System: Host, It's Time to Do a Mission

He traveled through time and became a playboy, a researcher, a sadist, a general, and a marginalized person in the workplace. The original owner of each world ended with hatred. He came and rewrote everything - joining the army and becoming a prince, serving the country through scientific research, redeeming his loved ones, overthrowing tyranny, and counterattacking in the workplace. Not for anything else, just because this is a task he must do