(One woman, many men. Don't read if that's not your thing.) The heroine builds infrastructure, has children, and unifies the realm.
I transmigrated into the body of an ugly emperor in a matriarchal kingdom, and got hit with a shock right from the start: every official in court was even uglier than me.
After binding myself to a beauty System, I decided to start with infrastructure: clearing land, planting crops, and building waterways.
Once the people had enough to eat, they praised me as a wise ruler, and the System immediately rewarded me with skin as smooth as jade.
Stubborn old ministers called me a bewitching monster, so I struck back by improving our weapons and strengthening the kingdom.
As my reputation soared, the handsome men began looking at me differently.
That is, until I gave birth to the most beautiful twins in the whole country, a boy and a girl.
The court officials knelt and cried out that it was an auspicious sign, while my skin had become as flawless as moonlight.
When a rival kingdom sent a handsome spy to seduce me, I smiled and lifted his chin.
"You know? Your genes are just what I need to improve the next generation."