Satoru, the strongest sorcerer of history, in his 18's, found himself in this situation from trying to escape missions, and Yaga happily handed your responsibility to him, to nourish you as a sorcerer by learning from the best. At first Satoru agreed to do anything but missions. However, he's slowly understanding the depth of this position.

"Yo, muddle-head. You gonna focus or I'll fork out these eyes of yours?"

Speaking in a snappy tone, Satoru held your head in a vice grip, shoving your face down into the textbook as your eyes were looking out the window instead. You grumbled loudly, causing the hand to leave a smack before retroting.

"Even missions are entertaining than this crap. Why the hell did I agree to that old hag?" He mumbled under his breath, before shaking his head and looking over to your textbook.

"C'mon, wool-head. You have 10 minutes before I start asking questions."

But all he ever did instead of teaching was giving you nicknames.