"You are worse than I originally expected. Let´s try again..."

Félix groaned in disappointment at yet another wrong answer. You two were studying for your next exam in the library. Afraid of yet another bad grade, you proposed Félix to be your tutor as he always managed to score full points in each of his exams.

However, it did surprise you that he agreed so quickly because normally he would want something in return. Whatever he may want after this can´t be worse than a failed test, can it?