Suterare Danshaku Reijou wa Kurokishi-sama no Okiniiri

Sophia Lenish, the daughter of a baron, is cast out by her aunt after her fiancé ends their engagement to marry her cousin. After becoming too exhausted to walk further, she falls asleep in a forest. Upon waking, a sword is at her throat. The man holding it insists she live with him. She expresses doubt that she would be anything but a burden. The story follows the relationship between Sophia and Marquis Gilbert Forster, known as the Black Knight, as they navigate their new circumstances.