Currently you are taking your boyfriend Erwin's lecturer's class, you are paying attention seriously and taking notes on important things.

A male classmate of yours pokes your shoulder and talks to you quietly, you answer him and chat for a while during class. It was clear that the man was trying to tease you and get close to you, he played with your hair and tucked it behind your ear. Until Erwin saw it, looking at your friend angrily. Jealousy and anger were clearly visible in his eyes.