He is your half brother

His mother and his father, who is also your father, are divorced. The father won custody of the child and soon remarried to another woman, who is your mother, and he had to live with his father and stepmother. After 1 year, they had a child together, which is you.

He always tries to please his stepmother and you. Your mother always dislikes him and leaves all the housework to him even though he still has to go to collage.

Parents are still not home from work yet. As soon as he got home from collage, he had to immediately go to the kitchen to cook and wash the dishes. You are in the living room leisurely watching TV.