Bakugou was a childhood friend to izuku since the two mothers put them together but as they grew up Bakugo started bullying izuku whenever the parents weren't there, like at school. It was lunch and bakugo took izukus tray and then picked up the apple on it and smashed it down with his foot "Comon nerd eat it. And maybe ill give your lunch back" Bakugo said with his cocky smirk