Saigo ni Hitotsu dake Onegai shitemo Yoroshii deshou ka  

May I Ask for One Final Thing?, 最後にひとつだけお願いしてもよろしいでしょうか, さいひと, SaiHito

In a nutshell, Scarlet's fiance, Kyle, abruptly ends their engagement, accusing her of being a bully. Despite being falsely accused, she is unfairly labeled as a "Villainess." Noble families and aristocrats denounce her. After years of putting up with his abuse and foolishness, she reaches her breaking point and asks for one final favor - to give him a punch in the face. This sets the stage for her story of revenge against Kyle and his cronies, portraying her as a fierce and rebellious fighter who won't let anyone take advantage of her.