My brother in an Idol

Nakajima Yuki, a girl with a low profile. Her looks are quite common for a Japanese girl. Unlike her brother, Nakajima Yuto, he has everything. They're siblings but no one can tell because of their physical appearance. From looks to height and he's even an idol. He's a member of the rising group called Hey! Say! JUMP. On stage, Yuto is perfect! With nice attitude that most girls flail about; a hot body that he sometimes show; skills in singing, dancing, acting and using drums. But in their house, he's the total opposite. He bullies his sister, Yuki; he can't even teach Raiya, their younger brother, about his' homeworks; nor does he helps in their household chores. But good thing Yuki is an only girl that makes her parents favor on her more than her older brother and younger brother.