I'm only one year old, what the heck is a Overturning System?! - Chapter 325 - 160 Wu... (Please Subscribe)

She killed his wife, destroyed his reputation, and ran off with his son. 8 years later, she returned home with her genius son, who already had a fiancée. “Give me the child, or you can’t afford the price.”“A girl who eats meat and vegetables doesn’t suffer, if you want a child, find yourself a woman to give you one.”

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates

Violet skies, a world undergoing massive changes, a deficient moon, interlinking voids…

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.