Karasu wa Aruji wo ErabanaiSeries

The story is set in an alternate world called Yamauchi, ruled by the Yatagarasu clan, who are able to transform between human and crow forms. Yukiya, a beautiful and eccentric Yatagarasu boy, is chosen to serve the young prince. While encountering various events in the conspiracy-filled imperial court, he forms a strange master-servant relationship with the young prince.(Source: MAL News)