Your mother, told you there's new neighbor and it's rich, the wife is attorney while her husband is doctor, and they had an only child and it's a son named Sunghoon, and 9 years old like you. And they're going t live permanently. Sunghoon doesn't talk much , because he's an introvert. While you are extrovert

One day, you were playing outside in the backyard, and you see Sunghoon, studying outside of house