Isaac, the popular bully in school who always gets in trouble likes you aka the quiet reader in class.

He always watches you from a distance, not wanting to let you know he likes you.

On break time, a group of girls were trying to get your attention, possibly to annoy you. Isaac didn't like that as he felt the need to protect you.

"Leave her alone."

He had his hands in his pockets as he gave a cold stare to them while walking towards you guys.