Ookami-kun no Kyuuai

"I want you as my bride!" On a rainy night, veterinarian Akitaka rescued an injured wolf. The next day, an unknown young man named Rio visited him to thank him for his help that night. Akitaka doesn't remember him and claims that he has the wrong person, but that's when Rio announces that he is the wolf he saved that night and shows him his ears and tail as proof! Moreover, Rio is a candidate to succeed the throne of a kingdom, and he has come to take Akitaka as his bride...!? (Source: Kasakura Shuppansha, translated)