Pangea no Musume Kunie

Synopsis

Yo Hinata is an ordinary elementary school student, whose grandfather had gone missing in a tropical island named Carabao 30 years ago, receives an unexpected visit one day, when a girl named Kunie suddenly appears, saying she's from Carabao and that she's his sister! Now, as Hinata has to adapt to his new life and help his sister, what'll happen?