My Identities Were All Exposed After I Was Pampered by Everyone at My Grandfather's House! - Chapter 362 - : The Key

She was one of the best assassins of the modern world; a sly, black belly, cutely stupid woman. She passed through into a mysterious world and into the body of a trash young girl that everyone brutally reviled. Idiot and ugly, they don’t know that she was a Seven Element Elementalist with a Dual Cultivation Body. Various Spirit Beasts and Devil Beasts would rush to make a contract with her. See how she plays the world at the ends of her fingertips and exact revenge on the people who made her life a living hell.

Just who is this bewitching villain?

Hey! I’m going to talk to you about something! I am not just a bewitching villain, I am your soon to be husband!

The woman roared: Who wants you to be my husband?

Bewitching Villain: Well, if you don’t want me to become your future husband, then why don’t you become my future wife instead?”

This world is nothing without you. How could you leave me alone? Even if you reincarnate a millennium later, I will still be here waiting for you.

He was a tyrannical emperor born between the heavens and earth thousands of years ago. He did not hesitate to defy the world, to turn the world upside down, to expend his Spiritual Force only for her to reincarnate.

He was the Demon Emperor born between the heavens and earth, Just so she can reincarnate, he fell into a deep, profound slumber, “Little Zi’er, as long as you live, even if it costs my life, I will do it for you. Just to know that you live, would make my wounded heart……whole.”

- Description from Novelupdates

[Read up to chapter 5, you won't regret it.]Haru Mizuki died the lamest death possible: alone in his room, playing a hentai VRMMO. No heroic sacrifice. No tragic accident. Just... pathetic.But instead of oblivion, he wakes up in Aethelgard.Cursed by Chronia, Goddess of Time, Haru gains an ability no one else has: he can't stay dead. Every time he dies, he loops back to his last checkpoint. What seems like a curse becomes his greatest weapon, infinite retries mean infinite opportunities to learn, train, and seduce.And seduce he must. Because Haru's cheat ability, Touch of the Goddess, lets him steal powers from anyone he touches... but it works best through intimate contact.Armed with death loops, a hacker-class system that lets him sabotage rival players, Haru begins building the ultimate multi-species harem. But he's not the only player in this game, and they all want the same thing: absolute domination.

The king of assassins was reborn, mastering both alchemy and poison. Sitting inside the space, there was a ghost that loved crying.

Aoki’s resolute face was indifferent. “If the sun doesn’t shine on me, please let me be surrounded by darkness!”
From a different perspective, look at the entire Pokemons world.

- Description from Uukanshu