Save the World? Forget It

Successful dad, elegant mom, strange sister, and hard-working him Oh my god, although I have thought about countless time-travel stories, and I am willing to travel back in time to become kings in ancient times, with countless darling wives and concubines, but I have never thought about myself in a parallel world! Fortunately, I have a system. Although this system always wants to erase me, it is better than nothing. What, you all have a system?