Due to his foster parents' divorce, he returned to his birth parents' home at the age of nine, but since his birth father was in conflict with his foster father, he could not be returned to his original family register of the Natsume family until he became 21.
養父母の離婚により、9歳の時、生家に戻るが、実父と養父の対立により21歳まで夏目家への復籍が遅れた。