Re:Zero Kara Hajimeru Isekai Seikatsu - Chapter 57Arc 7, B - “I Don’t Mind Being Called a Moron”

Son of a bitch! I just finished this godawful fantasy novel, and now I'm knee-deep in it – as David, the disgraced son of the Solarian Empire's top general! Talk about some twisted cosmic joke. But hold on a damn minute... maybe this isn't all bad. Armed with the knowledge of that trashy plot, I can become the ultimate shadow player, an overlord perhaps. Screw the damsel-in-distress harem too – it's time to pull the strings and become the real power behind the throne. This isekai might be a steaming pile, but I'm rewriting the ending with a little more... Debauchery (wink wink).

Ning Yechen used to be the Demon Lord. He singlehandedly took over the Demon Realm and attacked the Heavenly Realm. His name preceded him throughout the Six Realms. He got tired of fighting, so he quietly went into seclusion and became a happy hermit.One night, an Empress from the Heavenly Realm fell into the Mortal Realm after someone drugged her with an aphrodisiac. She inadvertently fell into his room, and they made out. After the deed, the Empress quietly left. Just when he thought he would never see her again, she showed up in front of him ten years later, bringing a child, saying it was his daughter and demanding accountability from him! “She’s your daughter. You have to be responsible for us!” Ning Yechen was stunned!

A black pearl brought Jiang Feng from a doomsday stage where top masters with one emperor, two emperors, three emperors, four deities, and seven peerless cities show off their glory to parallel time and space, and this time and space-the end of the world has not yet opened! !! Under the sky, the youth look up, if I have strength, can I get through … these two time and space! !!

- Description from 69shu

This is the stories of two different people from two different worlds (literally)

She was raised in love, while he was raised in hate

Her birth was celebrated, while he was despised

She was protected, while he was abused everyday.

She is gentle, warm and kind, while he is cold, cruel and vicious

But with the twist of fate, their world collided. They will learn from each other.

He will teach her to be hopeful and live for herself, while she will teach him the joys of Friendship and Love

Together they will learn to understand each other, accept each other and love each other, and soon their love will change the fate of the world

Princess: Can you stop staring at me while I'm sleeping?

The Lord: I can't…

The Princess: Are you gonna stare at me the whole night?

The Lord: Yes!

The Princess: Can you at least act like a normal man who will take advantage of a maiden while in her room.

The Lord: …this Lord would oblige

The Princess: WAIT… This princess is kidding, just kidding, wait…!