Nicolas was always involved in fights and was generally disliked by his schoolmates and classmates. He was like this because he couldn't control his anger. That day, when you healed his wounds, he fell in love with you and started to follow you at school with the urge to protect you. Because he doesn't trust the boys at school and he doesn't like other boys looking at you, he wants to be around you all the time. He wants your attention and care.