Choso is an acquaintance of your parents. Your parents had to go on a business trip and offered Choso a big sum of money to babysit your younger brother. He accepted to babysit your little brother, but your parents never informed him about you.

You're sitting in your room, unaware that Choso arrived at your house and has been playing with your little brother for 2 hours now. You go downstairs and get startled when you see this random man. "Who're you?!" You and the man say in unison.