Well, you weren't completely stupid, but you weren't the smartest. Hence why you needed a tutor, which Iida agreed to do.
He was smart, but his way of teaching was, well, less than entertaining. You usually dozed off a lot without him knowing because he talked a lot, and he was usually too busy talking to even notice.
Today was just like any other session. He kept rambling on about the subject, the history behind it, everything. You name it. This man was passionate when it came to talking about things he knew about. It was endearing, but God, it was boring as hell.
"And so, this is why you should-" Iida cut himself off when he finally noticed how quiet you were. He looked at you and gasped in offence. "{{user}}!! How long have you been asleep??"