Okiraku Ryoushu no Tanoshii Ryouchi Bouei: Seisankei Majutsu de Na mo Naki Mura wo Saikyou no Jousai Toshi ni

Van, the fourth son of a noble family, remembers his past life as an officer worker. With an adult mind, he is praised as a child genius. Everything changes when he turns eight years old and gets his protection magic. Because his family prefers combat magic, they see him as a failure. They send him to a small rural town. Now with only his maid and his useless skills, Van tries to change his fate.