Saigo ni Hitotsu Dake Onegaishite mo Yoroshii Desu ka? / 最後にひとつだけお願いしてもよろしいでしょうか
Rank: 324th, it has 6598 monthly / 71373 total views.
Authors: Nana otori / Hoonokisora
Genres: Manga / Shoujo / Action / Drama / Fantasy / Martial arts / Romance
Status: Ongoing
Summary:
The engagement between Scarlet, a noblewoman from a ducal family and the Second Prince Kyle was suddenly annulled during the ball.

She had been falsely accused of harassing a girl called Terenezza, daughter to a baron, whom the Prince doted on heavily.

Condemned by everyone around her, forced to burden all manner of crimes, she finally decided enough was enough.

“Before I leave here, may I ask for one final thing?”

As the crowd threw their boos and jeers, and that good looking guy flung his insults──

Her palm spun like a drill and the ballroom floor was stained with blood.
Resources:
https://www.novelupdates.com/series/may-i-ask-for-one-final-thing/

https://www.alphapolis.co.jp/manga/official/665000279