The supporting character's harem is very normal - Chapter 12: Camouflage skill

On the server “Altar,” a high-class survival game was officially launched. Survival was the only logic in the human game of alliance, betrayal, and human-natured games of deceit and treachery. After the smoke of gunpowder ends, only the survivors can speak.

As soon as he opened his eyes, the amnesiac An Wujiu saw a person at his side killed. While in confusion, a floating green typeface appeared before him.

Variable Name: An Wujiu
Attributes: Male, 20 years old
Game Rounds: 5
Win Rate: 100/100
Danger Rank: SSS

No wonder they were afraid.

The first time he saw An Wujiu, Shen Ti felt curious. The kindness and fragility in those eyes were not fake, so how could he survive in the Altar? It was until he saw the man had a sudden personality change. He recklessly gambled regardless of the cost, casually estranged people, grew further excited on the verge of death, and even calculated against himself to win. Only then did Shen Ti realize that it was his own cognitive bias.

Fortunately, he wasn’t a normal person either.

- Description from Novelupdates

William and his college class are ripped from Earth and thrown into Aethel, a world on the brink of collapse. Everyone gains incredible magical powers – except William. Mocked and underestimated, he’s an outcast among heroes. But William has a secret: an SSS-ranked skill that lets him travel to Aethel’s past. Learning lost magic from ancient masters, he’ll surpass his classmates and become the true savior Aethel needs. But can he overcome the dangers of the past and present to forge his own destiny? While others studied about the first mage, William could go back in time and see the first mage himself! While others dreamed of seeing a dragon, William could go back in time, hatch a legendary dragon egg and turn it into his puppy. While others used common materials to craft their items, William could go back in time and mine materials that weren’t find anywhere in Aethel anymore. Is it unfair? Perhaps, but William was not the type of person to not use the powers the universe gave him.

A human from Earth is thrust into the [Hunter x Hunter] world, becoming the Zoldyck family’s defiant, red-eyed prodigy. They call me a genius and the rightful heir, but I say that’s Killua’s burden to bear.Armed with crimson eyes, and a subtle yet powerful system, I’ll rewrite destiny, upend the world, and embrace the chaos with a wicked grin.