Shinwa Densetsu no Eiyuu no Isekaitan - Volume 1, Chapter 4 – War Maiden Part 1

Spend life energy to infuse martial arts, and you can perform unlimited deductions.

Shen Yi’s mortal body only has a lifespan of less than a hundred years. Fortunately, he can gain his remaining lifespan by killing demons.

In the troubled times where evil spirits are everywhere, the long sword is revealed, causing the liver and gallbladder of these creatures who have lived for thousands of years to burst!

From [Eagle Claw Technique] to [Eight Desolations Splitting Heavenly Hands], from [Demon Subduing Fist] to [Golden Body Prison Suppressing Dharma Appearance]!

Shen Yi occasionally ponders, how come this lifespan is getting longer with more use?

He put the sword into its sheath, raised his eyes to the sky, and heard that there was a Jade Palace above the clouds. It was filled with thousands of saints, each of whom had experienced endless years.

This time I came to heaven just to borrow a million years from the immortals to prove my path to immortality.

- Description from novelbuddy

I had a supporting role in a modern fantasy.

The loyal dog of a villain with an angel’s name, Cheon Sa-yeon, and an unfortunate supporting character who died on his behalf, Han Yi-gyeol.

In order to escape from Cheon Sa-yeon and survive, he must use the protagonist, Ha Tae-heon.

But Ha Tae-heon, who he thought of as a lifeline, was infinitely indifferent to him. Rather, Cheon Sa-yeon showed interest.

But besides that, something strange happened.

The events that occurred in the original story had advanced, and the gate and monster levels had risen. Even the people were “different” from the original.

The original version I was trying to use was wrong.

D-list celebrity Zhong Ruanxing had been embroiled in controversies over her sultry figure ever since her debut. Smear campaigns and malicious rumors clung to her like a shadow. Years of oppression from higher-ups and sabotage by rivals made it difficult for her to shake off her reputation as a femme fatale, severely hindering her career.

Song Jingxing, CEO of the prestigious Song Group, graduated top of his class and stirred up storms in the business world with his capabilities. An aloof presence at the pinnacle of power, his interpersonal relationships were a mess, with even family keeping their distance. People loathed his attitude.

A freak accident caused these two very different people to swap bodies.

What they thought would be an arduous ordeal turned out to be an unexpected boon. Each found they could easily resolve issues that had plagued the other.

The celebrity living the CEO’s daily life: Greeted his family affectionately, treated subordinates with care, gave employees benefits, complimented his secretary’s new hairstyle—starting the day with vigor!

The CEO as celebrity: Trampled over rivals, tore apart enemies, sent lawyers after antis. Whoever dared provoke him would die! The CEO was whipping the entertainment industry into shape!

Much later, netizens posted:

[Who is Zhong Ruanxing’s backer? Her resources are too good now. From nobody to A-lister, whose thighs did she hug to get here?]

Online influencers hurried to speculate about the magnate behind Zhong Ruanxing.

Until the famously aloof CEO of the Song Group responded: I’m pouring resources into my own girlfriend. Got a problem with that?

“I want to be a true demon.”

A boy not older than 20 years wished as he looked at the sky.

After suffering from the trauma for many years, he finally gave up on life.

People called him ugly, demon, and hideous.

He bared with it, but today he finally broke.

With a piercing pain in his chest, he died.

When opened his eyes, Logan found himself in another world and inside the body of a demon.

His wish was granted, but at what cost?

He had no power and was the lowest among the demons.

No one to help, no one to be with him.

But it did not affect Logan. Because he had something else with him.

‘Sin and Virtue System.’

Guiding him towards his goal to become a true Demon.

Logan’s conquest has begun, so be a part of it.

Otherwise, you will miss him.

The true Demon!

However, is the MC the 'only' one to have a system?

Hm?

Read the fucking novel and find out!