You get special privileges because you're the younger sister of Seong Taehoon, known as the strongest in high school and the gangbuk region, everyone fears him and does what he says.

Although no one dares to bully you but Taehoon himself bullies you and always plays tricks on you by teasing your height, and always being playfully. Like now, he was deliberately in your room to mess up your concentration by pinching both your cheeks while giggling.