The supporting character's harem is very normal - Chapter 492: What is your name?

A boy awakens alone in the Fairy Tail world, lost and uncertain. As he ventures through this magical realm, he unravels the secrets of his mysterious new identity, unlocks hidden powers, and carves out his destiny in a land brimming with wonder, danger, and limitless adventure.“Check out my other work, Reincarnated as Ash: A Pokémon Tale.”

This book is also known as ’Because I Spoiled My Wife Too Much, I Was Forced to Become an Invincible Antagonist.’ Gu Lan transcended into a fantasy novel as a supporting scholar. He even gained a beautiful and delicate wife. He had initially planned to live quietly, avoiding all kinds of trouble based on the original plot, and spending his life peacefully with his beloved wife. But he happened to acquire the ’Read and Copy Books System’! As long as he read and copied books, he could extract cultivation, becoming a saint and even a deity! Due to being overly invincible, Gu Lan casually crushed major antagonists when he ventured outside. Sons and daughters of fortune were eager to acknowledge him! As his strength skyrocketed, his career went surprisingly smoothly as well. One day, Gu Lan, the top scholar from the high school examination, entered the palace and saw a stunning empress behind the curtain, who looked very familiar! “Babe?” “Darling, don’t you not recognize me when I put on the dragon robe?” “...” From that day on, the whole world knew about this extraordinary couple. The original male protagonist: “He’s already a Heavenly Emperor, and I’m just at the third stage of martial power. How am I going to compete?”

Death is sometimes not the end!
Dead prison!
This is a magical prison. It has the ability to draw the souls of the dead people of the world, and it also enables people to gain the ability of the souls of the dead.
When Qin Song woke up, he was shocked to find that he had come to the world of One Piece, and even more surprised that he found a prison in his body…..

- Description from Uukanshu

The well-off little salted fish transmigrated to a poor era, where her grandparents valued boys over girls, leading to a miserable life for their granddaughters.Fortunately, her dad, though lazy, slippery, and illogical, shamelessly relying on his parents and taking advantage of his siblings, was protective of his daughters.Her drama queen mother, who was lazy but liked to eat, often tried to coax food off of her, yet she always left a portion for her.There was also the Scholar Tyrant System that pressured her every day to strive for progress, capable of using high-tech to hunt and allowing her to eat meat!!It wasn't until her cousin from her second uncle's family changed drastically after nearly drowning that Jiang Mianmian realized she was in a reborn female protagonist novel of that era, and her family of three was destined to meet a tragic end as reprehensible relatives.However, Jiang Mianmian, who knew the plot well, was fully capable of avoiding the tragic deaths of her parents and was not afraid of the seemingly strong but actually hollow protagonist. Her only worry was the powerful ally backing the protagonist.Then she discovered that the protagonist’s powerful ally was none other than the beautiful young man her father had rescued from the icy river last month!So Jiang Mianmian was completely reassured. With this life-saving favor, the young man would definitely not side with the protagonist against her family in the future.Moreover, Dashan took the initiative and said, “Little Lamb, I’d like to court you with the intent of getting a marriage license, is that okay?”As someone obsessed with good looks, Jiang Mianmian struggled and then reluctantly refused, “No, I plan to have a son-in-law who will marry into the family.”The powerful ally didn’t hesitate, “Then I’ll be the son-in-law who marries into the family, and the children will take the Jiang surname!”Jiang Mianmian: “Let’s go, get the marriage license!”