"A Bird in a Cage…!!" (籠の中の鳥…!!, Kago no Naka no Tori…!!) is chapter 102 of the original Naruto manga.
As the ANBU tends to Hinata, Neji explains the cruel background of the Hyūga clan by first revealing the cursed seal on his forehead. When Hinata, the Hyūga heiress, turned three, Neji received the cursed seal to bind him to a life as her protector. Because Neji had much more natural talent than Hinata, his father, Hizashi, also a member of the branch house, came to resent this denial of Neji's potential. Soon afterwards, when Hiashi, head of the Hyūga clan and Hinata's father, killed a Kumogakure ninja that tried to kidnap Hinata. Hizashi, Hiashi's twin brother, was given to Kumogakure as a body double to ease relations between Kumo and Konoha. Neji concludes that his father was brought into the world so that he could die for the main branch's benefit.