The supporting character's harem is very normal - Chapter 475 I am Medos

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

What if you were transported to a fantasy world with no special abilities, no OP weapons and no status screen to boost your stats? Never mind finding the dragon’s treasure or defeating the Demon Lord, you only need to worry about one thing—how to stay alive.A group of young Brits wake up in a strange, fantastical land with creatures from myth and legend. They are given archaic weapons they don't know how to use and told to do their best.Convinced it has to be some kind of virtual reality RPG, all the people summoned form parties and set off on their adventures, leaving behind the people nobody wants in their group.Story of my life, thinks Colin.

Shen Tang woke up and found herself in the body of a three-hundred-pound big fat woman, yet she had five absolutely gorgeous Beast Husbands.The beautiful Red Fox, overbearing Black Panther, gloomy White Snake, Mermaid tyrant, and strong Golden Eagle commander... each one was more exceptional than the last!The original owner was ugly and lazy, hated by people, and the Beast Husbands avoided her like the plague. When Shen Tang crossed over, the beginning was already a chaotic scene! Facing the icy, hateful gazes of the Beast Husbands, Shen Tang trembled all over with fear, kicked away the man in front, and turned around to run.Divorce, then divorce! This lady is not going to serve you!Yet at this moment, she unexpectedly bonded with a “beautification system,” demanding her to conquer these five exceptional Beast Husbands! As long as she increased their affinity, she could gain abundant rewards: acne cream, Weight Loss Pill, beauty pill... Shen Tang was tempted.Isn't it just conquering men? If you haven't eaten pork, you must have seen pigs run! She confidently checked the affinity of the five Beast Husbands, and the result — four hostile, one blackened, each wishing to rid her as soon as possible!She only had one little life, how could she conquer them?But later:How did the hated by millions become admired by millions?

Yang Dai, who was reborn in the third year of high school, was forced to enter the [Deep Domain] before he could be happy.

This is a world where gods and gods reappear and demons eat and kill mortals!

Myths are revived, animals and plants have been transformed into demons, foreign ghosts have invaded, and the status of human beings as the ruler of the earth is at stake. At this time, the mysterious [Deep Domain] came to the earth in the form of virtual games, bringing hope to mankind.

Yang Dai entered the deep domain to gain the ability to control the soul. Based on the concept of wretched development, he wanted to be a soul summoner, and he planned to form an army of souls first, and then explore the deep domain.

Unparalleled talent, the peerless genius of the dynasty!

The unparalleled demon king who is wreaking havoc on the world!

Covering the sky with one hand, the Patriarch of the Demon Dao who presses the right way!

When Yang Dai’s soul army appeared more and more terrifying names that shocked all beings in the two worlds, he also won the honorary title of Megatron.

Soul Master!

- Description from novelbuddy