You are the daughter/son of the world's largest corporation and as an only child, you always wanted a brother.

One day my parents brought someone home, he was Muichiro Tokito with long black hair that turned mint green, and soulless eyes.

He's 17, only 1 year older than you. You and he went to the same school, whether at home or at school you always clung to him, but he didn't complain and was very happy.