The supporting character's harem is very normal - Chapter 72 Alec screams – Radius is beaten

Cao Xin, a young man on earth, died in a car accident, traveled to a troubled world where supplies were scarce, and obtained a “Bronze Immortal Gate”…

…

- Description from novelbuddy

The labyrinth that swallowed humanity. Four choices were given to them.

Easy Mode, where anyone can survive. Normal Mode, where only those who fight survive. Hard Mode, where only 1% can survive. And the Solo Mode, where only one person survived.

The strongest returnee of humanity, Kang Taesan, was an Easy Mode player.

He heard countless times,

“What if you had chosen the Hard Mode, or even the Normal Mode?”

Regretting his cowardly choice while dying amidst destruction, he gets another chance to choose.

“This time, I won’t make the wrong choice.”

The strongest Easy Mode player has returned.

You Liangxing would never open the speech function in game.
That was because his voice was…
Particularly! Kittenish!

But there was one day, he queued up with a teammate who had so much to say that they may as well explode. Vexed to the point of no return, he contributed a voice that was capable of splitting heaven and earth, “Don’t BB.”
The other party who was being scolded stilled. In the ensuing silence, he suddenly let out a long, relishing… Moan.
You Liangxing: “…..”

Later —
He realised that the person was a great god,
Much later,
Without him realising,
He became the great god’s royal healer.
…. And also his boyfriend.

- Description from Novelupdates

This world is sick, and it must be cured with swords and forged with iron and fire.To slay tyranny, to cut down the unrighteous. To overturn heaven and earth, to mold the human world.All shall begin with the sword in hand.======When the Innate Wisdom Bearer An Jing received aid from the ancient Sword Spirit, allowing him to traverse various realms, he knew that his future would inevitably lead him down a path full of hardships and difficulties, hard to be understood by others, yet capable of changing this wretched world.And on this path, he would also crush many deserving scum underfoot.“Heh heh, the Myriad Tribes of this world shall greet the birth of this epoch-making giant like me with fervent wishes. World, I'm coming to save you!”Noble Officials/Demon Sect/Heavenly Demon: “Alas, is reconciliation possible?”Elements: Chaotic times of Martial Arts, cyber cultivation, gates between two worlds