I guess the ending might be florence with the girl that is not the beast lower because she does not have smell from when she was young and maybe that the white hair uncle Duke that said he was found another beast flower so maybe he end up with that girl he founded and have a beast child that would be next one to the throne after florance because in the last panel of the last chapter end with Florence with his daughter and the girl that grew up with him to be his daughter mother
He love his little sis so much he will be heartbroken to know that what was happening to his little sis while he's gone