Konyaku Hakisareta Gakeppuchi Reijou wa, Teikoku no Sumeragi Otouto Denka to Musubareru

Exiled from society for a crime she did not commit, a duke's daughter, Minerva, was heartbroken after two broken engagements and had given up on marriage. One day, while being scorned and exposed to the public at a tea party, she meets Rufus, the second prince of the empire, who is feared as "His Imperial Highness, the Prince of Jet Black." Minerva, who was admired for the way she behaved resolutely without losing her pride, is proposed to by Rufus and…?