In This Life, The Greatest Star In The Universe - Chapter 7:

After possessing the game’s villain, my goal was solely one thing –

To escape from this cursed game world.

[Embrace a death befitting a villain]

I failed on the first run.

But I resolved once more to escape this world…

“I missed you, Kyle.”

Yet the heroines who once loathed me began to plead for my affection.

She, the unfavoured adopted daughter of the Lin Clan, was just a pitiful little girl who had to live under someone else's roof.

And he, son of the richest man in the country, tall, handsome, and cold and evil.Originally, the two of them had not interacted at all.

However, due to a coincidence, she had become his wife.She had originally thought that she was only being used by him, but he would actually be a wife-doting man!

Whoever dared to bully her would be annihilated by him!

He was extremely overbearing outside, yet he was more like a hungry wolf in bed.

She couldn't bear it any longer and wanted to escape, but he blocked her.He lovingly asked, “Wife, you’re already pregnant with my child, where are you going to escape to?”

When she stands, she’s like a white peony. When she sits, she’s like a tree peony. When she walks, she’s like a lily flower. And when you look her in the eyes, she’s like the Great King of Terror.

Despite having the qualities to be a peerless bishoujo, because of the look of her eyes and that atmosphere of hers, she’s feared by others; such a girl is forcefully sent to another world.

Being told that she would be granted a wish as a special favour, the girl made a wish────

“Make my eyes and atmosphere normal please.”

This is a story recounting the lifestyle in a parallel world of a girl who would be perfect (probably) if just her one weakpoint was overcome.

A fantasy comedy with magic, dungeons, and a hero and demon king(candidate) who she gets tangled up with.

Wu Lai was an ordinary high school student. One day he was struck by a flash of lightning from a different world, and suddenly entered a fantastic world full of magic and swords. Since then, he started a totally new life. In this supernatural world, he had his ups and downs, experienced numerous battles, subdued powerful evil beasts, and fell in love with a belle. His nickname “Demon King” was remembered throughout the ages there.

Stay or return was a question. In the face of this choice, Wu Lai, with the nostalgia and gratefulness for the original world, finally chose to stay…

Here was the legend of “Demon King”…

- Description from Novelupdates