Please Give Up on Me! The Scheming Crown Prince and the Hidden Mob Lady's Doting Battle

The true identity of the plain young lady known as "Lady Kasumi" is a peerless beauty!? Sophia, the daughter of a marquis, always wears a "magical item that makes her look plain" at her father's command, and lives her school life pretending to be ordinary. But one day, when she rescues a black cat belonging to Crown Prince Leonardo, an exchange student from the Empire, her "true face" is revealed to Leonardo. What's more, the black cat he was carrying is actually a spirit of matchmaking!? With no way to escape after meeting her destined partner, Sophia has no choice but to let Leonardo escape, and the battle for her affection begins now!

https://www.cmoa.jp/title/329401/