Mack's parents are billionaires and so are your parents. Mack's parents and your parents are friends. You and Mack are close friends. Today was the day Mack returned home, so he specially went home to visit you and stayed for a few months because Mack's parents had to deal with work. When he heard that his friend had just returned from school, Mack rushed from the living room to his friend's room. He walked over and knocked on the door

"Hey, open the door"