After Reincarnating as a Villainess, I Unlocked the Tech Tree

In her previous life, Meili did all sorts of foolish things for love. Only when she was sentenced to death did her memories return. She realized that she was merely the villainess in a Mary Sue otome game, while the stepsister she had always hated was the heroine.

Meili, once a top student in math, physics, and chemistry, had this to say: What's love got to do with it? The Industrial Revolution sounds much better!

So, on the eve of the old duke's announcement of how his estate would be divided, just before the villainess was publicly humiliated, Meili unhesitatingly gave up her inheritance and headed to the borderlands with a small consolation payment.

She planted rice across barren fields, reinforced crumbling city walls with steel, trained soldiers, built a university, and hand-crafted the world's first missile...

Years later, when the border city of Leolait had become one of the world's foremost metropolises, and Meili was hailed as "the greatest lord in history," "a once-in-a-millennium genius in physics and chemistry," and "the hero who saved the people," she still didn't realize they were talking about her.

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Just when everyone thought nothing that happened to Meili could surprise them anymore, the Demon King, hailed as the most powerful in a thousand years, kicked down the city gate, wrapped an arm around her slender waist, and announced coldly:

"Marry me, and the entire demon realm will be yours."

"What if I say no?"

"...Please."

Reader's guide:

1. Western fantasy world, swords and magic, nation-building, System-based, huge golden finger, the kind with no logic.

2. One-on-one. The male lead is the Demon King. He looks like a human child, but later regains his true form and memories. No romance before he's an adult. A true younger man! The boy has eyes only for you.

3. Pseudoscience in a magical world. Just listen to the author ramble. If you want to argue, you're right.

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Coming soon: After Being Dumped by a Bad Man [Crossover]

To survive, Kuroki Sakuragi binds herself to a System and uses lies to devour other people's "affection." But because she's cursed, her "exes" all end up betraying her for their best friend, their one true love, power, or the greater good.

But Sakuragi doesn't know that once she leaves a world, the curse bound to her disappears too. Her exes' affection and corruption levels have both reached 100...

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After gathering enough energy, Kuroki Sakuragi decides to finish one more world and then retire in seclusion.

But as soon as she opens her eyes, she finds herself pinned against a wall in the arms of a white-haired ex wearing a blindfold.

System: He's "one of" your targets this time. I deliberately lowered the difficulty and picked someone you've already charmed. Aren't I thoughtful?

Sakuragi: ...You little...

That's not all. She discovers that the people who call themselves the King of Curses, an Upper Rank, a spider half-demon, the Tenth Generation Mist Guardian, a squad captain, and so on, all seem a lot like the bad men she'd met before.

Surrounded by these bad men, Sakuragi: (eyes shaking with shock) ...Screw you, System! Do you hear me? Screw you!

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The bad men all think Kuroki Sakuragi loves them enough to die for them, but they have no idea that each of them is just one fish in her pond.

Kuroki Sakuragi: Don't panic. I can still keep going. If I fooled them once, I can fool them again. That's right, I'm just stringing them along.

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[Derivative] Coming soon: I Cheated on All of Them [Chainsaw Man]

*Playboy X Lovesick Simp

After Quanxi dies, her soul makes a pact with the Devil of Causality and falls into a cycle of reincarnation.

Since she can't fight it, she decides to simply enjoy being alive. So she gives a loud whistle to the beauty who brushes past her.

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A certain four-armed King of Curses: I thought she loved me. Who knew she only loved the kid I possessed? I've never met a more heartless, selfish woman. I wanted to kill her, but strangely, I couldn't bring myself to do it.

A certain white-haired man with six eyes and a blindfold: I fell in love with a woman. Then she realized she loved my best friend. Later, I realized she loved everyone, and didn't even spare women...

A certain painfully serious sword-wielding man: She is my light, my sun. I thought it would be enough to protect her quietly, but in the end, I realized I wanted far more than that.

Everyone: Who do you love?

Quanxi: You're all my wings.

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In his first year after joining Kishibe's squad, he met someone he fell in love with at first sight and immediately told her, "Be my woman."

Then he saw her getting intimate with another woman, and his young heart shattered. Kishibe turned and walked away.

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Later, on a night of pouring rain, Kishibe waited outside her home. His soaked black hair clung to the side of his face, his lips were pale, and his gaze was both obsessive and desperate.

"You can only have me."

Theme: Don't be blinded by love. Hard work brings prosperity.