Siheyuan: I Keep My Head Down and Live Peacefully with the Life System

A food delivery rider from the 21st century is caught in an accident. The world spins around him, and when he opens his eyes again, he discovers that he has transmigrated into the world of Birds Filling the Courtyard.

He has barely arrived when he finds himself in the middle of the days when the moral paragon Yi Zhonghai is PUAing Silly Zhu into bringing lunchboxes to the Jia family.

Looking at the scene before him, the delivery rider can't help thinking, "A lunchbox? Why not just eat it myself? Hell, I've got a System now. Why would I bother with a lunchbox?"

It turns out that after transmigrating, he activated a Daily Necessities System. He may have arrived as a penniless nobody with only this one System, but he knows better than to make trouble. In this era, he just needs to keep his head down and stay out of fights.

Above all, he must stay away from widows, especially black widows. After all, his story is meant to have just one female lead, and he's not building a harem.