The supporting character's harem is very normal - Chapter 87 Ryne – Mom?

Marcella Valemont was a villainess wrapped in silk and thorns.The alluring, selfish daughter of the High Priest, she was forced into a cold marriage with the Black-bellied Duke Berith Montclair. She longed for power and would stop at nothing to claim the crown, even if it meant seducing the incorruptible Crown Prince Lucian and clawing her way to the throne into becoming the Queen.Until it all burned.Her ruthless schemes led to betrayal, rebellion, and ruin-- an empire on its knees, a virtuous king destroyed, and a rebellion led by the man she discarded. Desperate and full of regret, she barters her life with the Duke to save Lucian.In an interesting turn of events, Marcella gets to go back in time to fix her wrongs, save the man who was ruined because of her and hopefully stop the bloodthirsty rebel Duke Berith.She finds herself reborn as her 18-year-old self with a chance for a do-over and vows to do better this time.But the past does not forget. Nor does the devil in her husband’s skin.Secrets long buried begin to surface, and Marcella discovers that her former husband is far more than he seems—a man cloaked in darkness, harboring a purpose that threatens everything she holds dear.They say second chances come with thorns and to fix the past, she must trust the devil who destroyed it.

A maid who is beaten on behalf of a noble boy.

Some memories of her childhood were cruel, but Yuriel held no resentment towards the boy. Rather, she liked it–The hand that carefully applied medicine to her wounds was always warm.

“M-Master, stop, Raph, sa, save…ah, mm…!”
“That’s why.. I told you.. to wait.. till I returned.”

But the Raphlet that appeared in her dreams showed nothing but passion and lust.

Prophetic dreams.
The ability that was like a stigma drove Yuriel towards an unknown future.

All I want is to be next to you.

Jiang Lin crossed over, he became the tragic little cannon fodder in the book.

The little cannon fodder relied on his good looks, and there was no man in capital who hadn’t been seduced by him.

He was a well-known playboy in capital, an existence that everyone despised.

Only Jiang Lin who became the cannon fodder knew what kind of life the cannon fodder lived.

The little cannon fodder’s father didn’t care, his mother died early, and his stepmother treated him harshly. There were also two stepbrothers and a “beautiful and kind-hearted” heroine sister in the family.

The first stepbrother robbed him of his position as a companion of the crown prince, and the second stepbrother robbed him of his qualification to be a student of the Imperial Academy; in the end, the heroine sister arranged him to marry a man who was about to die.

From anyone’s point of view, what Jiang Lin took was a death script. But Jiang Lin held the space in his hand, who was he afraid of?

So——
Jiang Lin made a great contribution in front of the heroine, and successfully regained the position of the eldest son of the Hou family from the hands of his two stepbrothers.

Jiang Lin successfully solved the famine and became famous all over the world as a Marquis and held the nobility.

As for the dying man Jiang Lin married, not only did his legs recover from the poison, but he also became a fearsome General, the God of War.

- Description from Novelupdates

The little handsome son-in-law passed through a world as waste material and the husband of a wealthy family. But because of his lacking aptitude, the wealthy family had driven him out. So he worked hard and found a more powerful family’s thighs to hold onto. Soon enough, he became the strongest son-in-law and husband in history.

In this world, it was impossible to practice martial arts. It was futile so he might as well take advantage of his wife’s thighs and maintain a comfortable and leisure lifestyle.

He’ll train his wife to become the strongest and best person in the world.

“Whoever dares to provoke me, let my wife kill you!”

- Description from Novelupdates