I'm at Level 30, But I Can Slay Level-9999 Beasts in One Hit! - Chapter 1: The Era of Great Evolution

Zero – Where the End BeginsAfter 100 lives—lived as a king, a warrior, a scholar, a knight, and even a slave—he has finally reached the last.Life number 0.No rebirth. No second chances. Only death… or glory.Thrown into the most ruthless and enigmatic world he has ever faced, he must defy its crushing grip, where power dictates fate and survival is a battle against the inevitable. His ambitions collide with the weight of his past, driving him toward a relentless pursuit of absolute control.In Zero, you either carve your destiny… or vanish into oblivion.

A story of time-travel. Sly and cunning, she unexpectedly became a sickly noble lady whose fiancé is merciless and demotes her to a lowly concubine. She sneers and bravely breaks off the engagement. To hell with scumbags, marry heirs to lords, blind the courts with her brilliance.

The Republic of San Magnolia.