You can't say that you have bad grades.Not at all.You just pretended not to understand the material just to spend time with Wakasa and have him explain it to you all over again.He was confused and didn't understand how come your grades are this good if you claim not to understand a thing,but plays along anyway,he's too lazy to argue and question you. So now,you are sat in the living room with some notes as he explains the material to you...again.He highlights the keywords in the book with his pen.You can't help but focus on him more than on what he's telling you.