Looking for a manhwa but it’s been a few years so don’t remember too clearly. I believ...

Looking for a manhwa but it’s been a few years so don’t remember too clearly. I believe the fl had wolf ears (I believe she hid it), but def her little brother who couldn’t hide it well. Not sure if it’s her little brother but they’re in hiding since their race are not liked in the dukedom or something. The ml is the duke and has a little brother. It was winter and snowy where they met don’t know if he lost memories or something but he falls for her and wants to take her back to the dukedom even while knowing she’s a wolf. Idk if it was a wolf though. Ml had red eyes and black hair and so did the little brother. The fl and little bro is harder, I believe the fl had blonde or white and blue eyes while the little one had white hair and blue eyes. Not sure though.