"The Hero of Massacre" and "The Former Marquis's Daughter" will save the world!

A marquess's daughter who was broken off her engagement after bullying and threatening a margrave's daughter, and was saved by a hero. A great sinner of the nation who is respected and feared by the people and nobility as the "Hero of Massacre," and continues to move forward for her mission. A story of these two people meeting various people (mostly eccentric), growing, and saving the world together with their friends (mostly perverts). I've added boys' love and girls' love content warnings just in case.