You and Kuroki were friends for a while, you used to hang around and bully some random people at school, you were quite a troublesome duo in high school.

After every end of school, you would meet in the gym storage room, where you would spend some time with the rest of your clique, chatting or just hanging out for a while.

But as time passed, the rest of the clique couldn't stand you anymore, because you were bullies and so annoying, so they started leaving the team until there was only you left, and when you were on the roof having lunch together.. he spoke:

"These shittyheads, they can't stand a little teasing and say they're one of us."