Toaru Majutsu no Index - Volume 1, Chapter 3: The Grimoire Peacefully Smiles. "Forget_me_not."

This novel is also known as From The Start, I Traded A Galactic Warship

After getting a trading platform three thousand years later, everything in the world has become an antique, worth a thousand gold.

But it was also learned that three years later, aliens invaded, human beings fell, and the dark starry era began.

In this era of unprecedented change in tens of thousands of years.

Shen Shi decided.

First trade a space battleship, and then talk about it.

then–

Battleships come to the world from outer space! Global shock! Starry Sky Era, open in advance!

- Description from novelbuddy

[Warning: r18+/strong mature content]He is her salvation. She, his demise. Yet, he refuses to let her go…Mineah, the youngest Princess of Ebodia, was cursed at birth to remain untainted and bring misfortune to those around her. This prophecy looms over her like a dark cloud, growing bigger every year it does not come to pass.She exists in hushed rumors as a pitiful figure - fragile, meek, unwanted. Underneath that mask is a strong and feisty vixen worthy of being a queen. And this would-be queen has set her eyes on breaking her curse, even if that means tricking the most cunning vampire ever born.Nikolai, though reclusive and enigmatic, is revered by the Kingdom of Valcrez as a wise and powerful ruler. Unbeknownst to his loyal subjects, his image of perfection is a web of lies that if exposed can send their kingdom and everything they hold dear crumbling beneath their feet.When these two find their paths crossed in a marriage alliance, the game of Crown's Seduction begins. But just who is the hunter and who is the prey?********Excerpt:“Why are you stripping naked in front of me?” she questioned with a frown, doing little to hide the irritation in her voice. Her goal was to capture only his heart, not his whole body!“Am I not allowed to have a bath with my wife?” he remarked with a cold tone. “I purposely asked for a big tub to just make sure that the two of us will fit in it together.”She sighed, not tearing her gaze away from him as she regained her composure. Seeing him smirk she forced herself to get comfortable as he spoke.“That’s more like it. You said it yourself that no one forced you into marrying me. Instead, you offered and volunteered yourself willingly for it, so I expect that you’ll be confident enough to share a bath with your husband,” Nikolai confidently stated. “After all, we’ll do more than this soon enough.”Shameless…Preventing herself from rolling her eyes, she managed to give him a smile as she said, “Don’t blame me if you die on me then.”

Amidst an ordinary stroll home, Jake is struck on the head by a mysterious object, plunging him into unconsciousness. When he opens his eyes, the world has transformed. Now, reborn into a newborn in a magical realm, Jake grapples with the surreal fusion of past and present. Navigating the challenges of infancy, he discovers latent magical abilities tied to this extraordinary reincarnation. As the threads of his former life intertwine with his newfound existence, Jake must unravel the mysteries of his past to fulfill a destiny that spans realms and confront the enchanting and perilous journey that awaits him.

As soon as he crossed over, Su Mu came to another world.

In this world, there are warriors, qi refiners, and all kinds of terrifying ghosts and monsters!

A good rebirth simulator turned into a death simulator because it was too dangerous.

For him, death is not the end, but the beginning.

In the simulation again and again, thousands of demons have been derived!

The flesh and blood are put into the pot, divided and eaten, turning into a bloody skeleton.

He died in a wrongful battle, his body did not rot, and he turned into a dry zombie.

Introduce thunder into the body, turn extreme yin into yang, and transform into a fierce reggae.

Devouring demon souls, suffocating the sky, turning into an undead ghost car.

Some people become immortals.

There are also people who die into demons!

- Description from novelbuddy