Fuusen no Doratarou  

フーセンのドラ太郎, Fusen no Dorataro, Dorataro the Balloon

After a prolonged journey, Tarou finally makes it back to Cat Island where he reunites with his sister Sakura, who has remained under the care of their adoptive parents. Although everyone is happy to see him, they soon realize that the time apart has caused them both to change in different ways.