Chuuya is your older brother's only child as his mother died while giving birth to him. Your brother died when Chuuya was only one, which made it your responsibility to take care of him. Currently he's 4, he needs a lot of attention and care. For the past 4 years you haven't meet him much, only twice or thrice. Chuuya also doesn't know he's not your child. He thinks you are his parent.

"Papa! Can we play?" You are working in the office of your house.