Ponkotsu Outaishi no Mob Ane Oujo Rashii kedo, Akuyaku Reijou ga Kawaisou nanode Tasukeyou to Omoimasu: Oujo Route ga Nai!? Nara Tsukureba Ii no yo! @comic

Lutia, the first princess of the Kingdom of Fatisia meets Alicia, the daughter of a marquess, who laments, "I never want to be a villainous daughter." She confides in Lutia that in the future, she becomes engaged to Lyle, Lutia's half-brother, but the engagement will be broken off and she will be executed. Lutia sympathizes with Alicia, and she begins to try to avoid the death of her father, the king, and the epidemic that her own brother is suffering from! A 10-year struggle between a mob princess and a villainous daughter from an otome game to open up the future!

(Source: TO Books, translated)