No Benefits for the Reincarnated

When Airi is reincarnated as a noble's daughter, she expects an easy life—until her family goes bankrupt and she's forced to work as a maid for the Grand Duke. While chasing a young lord, she stumbles into a hidden chamber and is trapped for what feels like 100 days. But when she escapes, twelve years have passed, and the world is at war with monstrous beasts. Now, Airi must navigate a broken kingdom and rewrite the story of her second life.

(Source: Webtoon Entertainment)