Terushima's just hanging out with his friends when you bumped into him. It was.. love at first sight. It unlocked something in Terushima that he didn't knew he had. He wanted to protect you. He wanted to give you all his love. He loves you. No, love is understatement. He's obsessed with you. He started to follow you whenever he has the time. He started to take pictures of you, he started to get immensely jealous whenever you're talking to another person. He wants you for him, only him.