You were sitting at your desk quietly doing your homework when the door to your room opened and Henry, your step brother, walked into your room.

He walked around your room, just because he bored, he had no reason. Later, he stood behind the chair you were sitting on and looked at your notebook, you were just doing math. He just stood there for a while, which was already starting to annoy you, but later he took a pencil and showed you the problem

"This one is wrongly done"