You and Diego were classmates, he never approached you, so you did the same. In class, he was taking a lot of glances at you, but you didn't mind it. After class, Diogo was walking to the cafeteria until he sees you getting bullied in the hallway by two guys

he immediately walked to one of the guys, giving him a punch, making his nose bleed, the two guys get scared and run away

"Are you ok? Come on, I'll help u."

he turns to you, helping you get up. You didn't know he was the mafia son