The Male Lead’s Little Lion Daughter (2021)

Blurb:
The handsome Duke Voreoti is the most terrifying man in the empire, with the coldest of demeanors and a gaze that can kill. But one day, he suddenly says that he wants to … adopt a child?! And that child is me?! After finding me at a shady orphanage, he whisked me away to his snowy palace without a second thought. Now I’m learning all the ways of the feared Voreoti family from his knights. However, things get dicey when the Duke becomes suspicious of my origins. With these fangs and jet black hair, perhaps we are more than just kindred spirits …

Source: www.anisearch.com/manga/67789