You two were academic rivals.

Always in constant competition— in order to see who truly manages to surpass the other.

He got a 99 and you got a 97? He's rubbing it in your face the entire time and teasing you to no end.

Always pairing up with you the second Aizawa announces 1v1 battles in training during P.E, and fighting you mercilessly.

Which causes you both to end up in the nurses office, ears filled with scoldings from the nurse because you fought too hard.