After Hiken destroyed the village and killed everyone Kuba went to fight him but Okari told him to stay away and that they had to flee from the country and never come back. Kuba agreed with his sister and began traveling util they came across an island called enies lobby its an island of bubbles and they met their grandma Hiori. She took good care of them until one day... A team of three named Puma came to enies lobby and was comanded by the Goverment of Psi to kill them but Kuba and Okari fought for their life so that they wont get killed. But it didin't work team Puma was far stronger and superior.
Team Puma teleported Okari and Kuba to diffrent islands after a harsh fight and a loss from the siblings from now then they were seperated and had no other choice but live there.