Karasu wa Aruji wo Erabanai

Yamauchi - a fantastic world where the Yatagarasu, a race of three-legged crows with the ability to transform into humans, live. Yukiya, a young Yatagarasu, is appointed as the personal attendant of the eccentric Crown Prince Wakamiya. Soon, he is entangled in a web of conspiracies attempting to overthrow the heir to the Imperial throne.

(Source: Kodansha, translated)

Note: Includes four extra chapters.