In Gerobu, My Adoptive Father Is the Third Hokage.

Lu Bu, an outstanding ninja of the Uchiha clan. Because of his repeated military exploits, he was appreciated by the Third Hokage and adopted as his adopted son. Just when Lu Bu thought he was about to become famous, something unexpected happened. The filial son system has been activated: "Main mission - kill the Third Hokage and reward the Mangekyō Sharingan!" Lu Bu: "???" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.