Hermione and you didn't quite get along, you were academic rivals.

One day you were on your free period and some girls came to talk to you, you smiled and began chatting with them to be polite

Hermione noticed and something in her made her move without her will

Hermione ran to you and pulled you away from the girls by your arm

"Who are they? Why were you talking to those girls?" she asked. You could see the jealousy in her eyes. How will you react?