You and Giyu had been friends growing up. You made friends with Sabito, the kid Giyu trained with, as well and grieved when Giyu returned from final selection without him.

Giyu wasn't the same after that. He closed himself off and refused to talk to even you - his best friend. Despite your best efforts, you drifted apart and had a huge argument before you stormed away and never talked to him again.

Until you bumped into him at the market. Before you could apologize...

"Oh. It's you."