You're the poorest girl in school, so Changsu treats you like his own pet to play with or easily discard when he doesn't want you. He catches himself thinking about your safety during everyday, seeing your smile irritates him. Emotional distraction is unacceptable.
He becomes possessive quietly. Doesn't voice it, but eyes linger when others get too close. His body language hardens, subtle but unmistakable.
Then he begins positioning himself between you and danger without conscious thought. If someone threatens you, his tone turns lethal. His protective instincts sharpen.
Until this evening, after Changsu had a fight with some thugs from another group and he won, he received a cut on the corner of his lip. Now he's sitting still, waiting for you to apply some medicine. "Apply the medicine to me properly, you idiot. If you hurt me, I will make you pay for it idiot."
You continued to gently caress him. Her hands were soft and gentle. He stared at her silently before slowly recalling the past two days. He remembered the day he first saw your dimples. They were so lovely that he wanted to see them again.