Hachinan tte, Sore wa Nai Deshou! (The Eighth Son? Are You Kidding Me?) is written by Y.A. The manga is drawn by Kusumoto Hiroki and the LN art by Fuji Choko.
The story follows Ichinomiya Shingo, a 25 year old man who wakes up in an unknown room and realizes he's in the body of a 6 year old boy. Learning from the memories of the boy, he's now the 8th son in a poor noble family. Having no administrative skills, he can't do anything to manage the vast land his family has. Fortunately, he is blessed with a very rare talent, the talent of Magic. Unfortunately, while his talent could bring prosperity to his family, in his situation it only brought disaster. This is the story of the boy, Wendelin von Benno Baumeister, opening his own path in a harsh World.