Waga Deshi ga Mottomo Tsuyokute Kawaii Nodearu

Synopsis

The strongest mage in the world is taking up a new hobby. He will train his apprentice in an unorthodox way… She's so cute that instead of being a strict master, he acts more like a doting parent instead! They will enroll in the magic academy together! All for the sake of guiding his apprentice — a free-wheeling life at the academy is about to begin! (Source: Fantasia Bunko, translated)