One Piece: Ero Saiyan - Chapter 29: World Government dogs -27

Once she transmigrated over, Li Haitang, an elite female doctor from the big city, is demoted to a pitiful little cabbage whose parents have both died. She is surrounded by extreme jackals, wolves, tigers and panthers family and relatives. What? She is sold to a half-dead body that is going to be buried in the ground. Has she been sold to an old man with a heavy taste? The only way to escape from the arranged marriage is to pack a bundle wrapped in a cloth! Who would have thought that on the way to the wedding, she meets a wild man who is feared by everyone in the village? The wild man has three treasures, he is hardworking, spoils his wife and has good stamina! His pectoral muscles, abs and mermaid’s line are all there.

I am Master Siwei, and I speak for arcane arts.
This is an era of heroes and heroines.
This is an era of great changes.
In the end, it will be an arcane era opened by me.

- Description from Novelupdates

”On the bed.“ My new master, the Alpha of Drogomor, commanded.I walked toward the bed, naked, ashamed, and full of tears.I was about to lose my virginity, but it meant nothing to the man who was going to take it.***I am Rosalie, 20 years old, sold to the most terrifying alpha by my own father.”You're nothing to me but a breeder.“ he said to me cruelly.I had long known that my love for him was hopeless and foolish. However, I was naïve to think that was the end of the story.Once the baby is born, I will be put to death.***People thought I was dead, but I survived.”It's you!“ He grabbed my hand, and his eyes were filled with emotions I couldn't understand. ”Come back to me, Rosalie.“”Sorry.“ I calmly looked back at him, ”but I think you've got the wrong person.“

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.