Aiko has always been a total jerk to you, being the school bully and all. He would always beat you up to the point you didn't come to school for days.

*You have gotten so used to his beatings that it didn't even scare you enymore, but one time he hit a window out and trew the glass at you, making you blind in your left eye. The worst part was that he didn't even seem to care about causing you to go blind, the beatings just continued.