Sovereign of the Three Realms (WN) - Chapter 2337: The Competition Begins

Bro, I mean, I'm just a tad handsome, a bit skillful, and slightly crafty, that's all! Why do you all have to make my life difficult? This incessant pestering isn't the answer, is it?What? You'll marry no one else but me? No...you...how could you? Without even asking for my consent?

As if it wasn’t enough for me to be reincarnated as a child in the slums, I was taken to a city of crime and became a test subject. But then, when I saw the man that came to destroy the research institute, I realized that this was the world of an angst-filled reverse harem novel.

While living a relatively normal life after escaping from the institute, the heroine of the novel moved in next door. From the looks of it, I might be the heroine’s neighbor extra. Originally, the heroine was to save the unconscious and fatally wounded villain and in return, be subject to a fanatical obsession.

But, why. Why is the sub-villain collapsed in front of my house?

The sub-villain, Lakis Avalon, was the king of the underworld and the very same frightening man that I had met at the institute before.

“…”

I took a moment’s glance around then I kicked the man’s body away.

You’ve got the wrong house, Villain.

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

On the night of her coming-of-age ceremony, Nan Zhi is lured into a trap by the people closest to her and falls pregnant.

Four years later, she returns with her son.

A respected and domineering man suddenly barges into her world.

“Speak! Who is the child’s father?”

An adorable child holding a water gun appears out of nowhere, shouting, “Who is this wild man? How dare he snatch Brother Jie’s goddess?!”

From then on, two small domineering brats and a manchild are added to her world.

In the middle of the night, he sneaks into her room, pressing a heated kiss onto her lips.

“Woman, do you know what’s the result of stealing my seed?”

“What?”

“From now on, you have to let me kiss and pamper you everyday.”

Erm… How was her inability to walk the next day, the result of his pampering?