The Sky Flying Zorori Castle. Zorori and the boars are starving after not having eaten for days and find a piece of cake. They all try to eat it at once causing the cake to be smashed against a tree. At first they are disappointed but then are shocked to see there was a hook under the cake. They tie the hook onto a tree hoping to get whoever was trying to trick them to show up, but instead the entire tree was pulled into the sky, and them along with it! They end up in a castle flying in the sky that turns out to be none other than Zorori Castle. The castle explains that the mermaids grew homesick and then set the castle free. The castle got lonely and decided to find a new master, and managed to fish his old master back. Zorori agrees to be the castle's master again and for several days all goes well. Then the castle runs out of food because Ishishi and Noshishi are gluttons. When attempting to find more food by going back down to Earth, the castle freaks out and imprisons them all, for fear of being left alone again.