Your Girlfriend Was Amazing - Chapter 25: The Witch’s Contract and Blessing

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
…
It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

I reincarnated as the wife of the cursed archduke in my own twisted novel.

As the author, I have a responsibility to fix this novel.

I have lifted the curse, which is the main problem of this story.

I thought my job was done. But when I was trying to go back, the archduke asked me, “Did you really think I wouldn’t know that you’re planning on returning to your fiance?”

‘My fiance?’

What I’m gonna do? He completely misunderstood the situation!

All I want is for him to please let me go home!

Cao Gui: “Well said! System, but do you want to explain why this is not Marineford but Manhattan in New York?”

System: “…”

Cao Gui: “System?”

System: “…”

Cao Gui: “System, say something!”

- Description from Novelupdates

Mark hatched out of an egg one day, reincarnated as a demon!His body was as strong as iron, instincts capable of noticing a silent fly multiple meters away. Eyesight sharp enough to see the small holes in an enemy’s clothing.Moreover, he also had a system.[Soul Devourer][Eat souls to grow stronger.][Mind-type Demonic Tricks have been derived out of your demonic bloodline!][Heart Input!][Input unsolicited thoughts in an enemy's heart and influence them!]Mark took a deep breath.How can he allow himself to live a mediocre life after being given this second chance?Now, he wanted it all!Women, wealth, power, status, and even eternal life!His ambition was set, his heart was on fire. A demon had been born.