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!