Teach me (Kiyotaka Ishimaru x Reader)

When you, the Super High School Level Traveler, get called out by your teacher to bring up your marks, the only possible thing to do is to get a tutor. Even though Kiyotaka Ishimaru is the best student in the school and you are a fairly intelligent student, you both get taught things that you never knew before. Some things that they don't teach in school. EXCUSE THE SANS PICTURE LONG STORY

(Non Despair au)