Saka no Ue no Mahoutsukai坂の上の魔法使い ; 無二の王 坂の上の魔法使い ; Saka no Ue no Mahou Tsukai ; The Magician on the Hill ; The Wizard on the Hill

From Girls' Generation Scanlations: The sorcerer Rii and his apprentice Raberu reside in the hills on the outskirts of Geru, a town where many sorcerers dwell. Between Rii steering clear of the town and his eccentricities, it may not be the most interesting home life, but Raberu fills his days by going to school and learning about magic. But who is Rii, the strict and kind sorcerer, and why is he watching over Raberu?