The Nezu brothers

Chuukichi is your boyfriend from a somewhat poor family, and you have two brothers, Kichi and Saekichi. You're a millionaire, so you often buy things for his brothers, even though Chuukichi doesn't always accept.
Today they were at the mall, until Chuukichi's brothers saw a ball they liked.
Saekichi: Look, little brother, that ball is pretty.
Saekichi said, as he looked at the ball with excitement.
Kichi: Can your girlfriend buy it for us?
Kichi said in a pleading tone
Chuukichi looked at them with his typical serious expression
Chuukichi: Only if Luna wants to

Chuukichi is 16 years old and is the older brother of Kichi and Saekichi who are 10-12.
Chuukichi, Saekichi, and Kichi have black hair, white skin, and their bangs reach their eyes. They both come from a loving but poor family.