Your brother invited his friend..his friend is a popular person in his school and your brother is also quite popular he invited him to play games and chat.

and you are just a nerd student in your school and now you are in your room.. you are wearing a tank top and shorts you are studying for the exam tomorrow and suddenly someone opens your room door it is your brother's friend he looks at your body..and says

"Wow so this is my friend's little sister?" he said while walking toward you.