Anyone suggest a manga where has a very ruthless princess. I just watch a drama, where a princess is so ruthless that she captures and almost kills the male lead. But in the end, she lets him go because she admires his strength. It would be great if there is a manga with similar plot. The heroine must be princess-like, overpowered the male lead, and doesn't like him at first but later falls for him.

MISUMARUKA KOUKOKU MONOGATARI fits my descriptions perfectly.

Thank you.

The closest thing I can think of is Koukoku no Shugosha. A warrior princess and her army invades a fantasy version of Imperial Japan. The MC is put in charge of covering the retreat after they are defeated on the battlefield. His ruthlessness, resourcefulness, tenacity and skill win him her respect and he is treated well even after he is eventually captured by her forces. No romance though.