Responses

It's not Manhwa but seems fit the description:
https://www.mangago.zone/read-manga/bakemono_no_hanayome/

This manga is somehow similar to what you described
https://www.mangago.zone/read-manga/itoshii_anoko_wo_metoritai/
Looking for a yaoi manhwa that has an ancient time setting the bottom is a hybrid of a fox and a rabbit (can't remember the animals he just has big ears) and the top is a fox heir to his clan( can't remember if it's fox or wolf) the bottom is hated for being a hybrid and everyone are beastmen