The supporting character's harem is very normal - Chapter 4: After Lathel’s Death (3)

After millions of years spent hunting and battling, the forces of darkness were finally pushed back and eradicated. But as Twilight’s lifespan approached its inevitable end, he made a fateful choice—to reincarnate into the future, where a golden age was prophesied to unfold.Now reborn as Twilight Nightfall, a boy who had lost everything to the world, he remembered nothing of his former life.Stripped of purpose and will, he strayed on the path of despair. Yet, in his darkest moment, a reason to live revealed itself.Chosen as one of the sovereign system holders, Twilight was granted an opportunity to prove himself.With sufficient potential, he could earn the highest privileges, rise to the rank of seeker, and represent humanity in the Astral Realm—a game-like world filled with mythical races, limitless resources, and boundless opportunities.Follow Twilight as he ascends to the apex of the Astral Realm, dominating players and rivals alike while gradually piecing together the shattered fragments of his past life, becoming a legendary figure in all worlds.

Ray was more of an average guy in everything, whether it was appearance, in sports, or in school. Ray lost his parents in a car accident when he was little so he grew up in an orphanage.

He had no friends and was always bullied in school cause he was skinny so he was an easy target.

Then one day when he was running away from bullying he ended up in front of a truck that crushed him and he died.

But his life didn't end there as he reincarnated in a fantasy world but as a beast.

But with his bad luck, he was reincarnated as a low level beast with low stats, but he has a trump card, An evolution system that helps him in this new world. How will he evolve and become the strongest of All.

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.