I Became a Nobody in My Favourite Novel - Chapter 22: “An Extinct What?”:2

“I’m in desperate need of money to pay Grandmother's medical fee. I will marry Charles instead of Yvonne as soon as I get the money.”

When her sister Yvonne ran away from the wedding, Autumn was forced to pretend to be Yvonne and marry Charles. Her only wish was to get a divorce after a year. Charles is rich and powerful. His name had been linked to innumerable ladies. He had different girlfriends for every day of a year. Neither of them had expected that they would fall in love with each other.

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

“You want to steal my genes then leave?” He grabbed her and tried to force her to hand over the child that was born three years ago.

I never thought I had meaning to my life, but I guess I have a talent too.

「Get ready. The duel will begin soon.」