In this short scene, we learn that the mysterious Hirohito is hiding out in a tree. He's wearing a mask, which he calls a "pig brain" , and he's surrounded by a group of wild boar, who've come to visit him. The two of them have a little spat about who's really in charge of the family, and the pig brain says he'll use the mask to blackmail the family. The brothers are interrupted by the sound of a river rushing by, and they're interrupted by a sister singing a song in the distance. The sisters are singing a sweet melody, and Hirohio is singing a sad song about how he hasn't seen his brother in a long time. He doesn't want to know who he is, so he pretends to be angry at the sight of his sister. He wants to protect the environment, he says, so they should protect the trees. The pigs below are looking at him, and if he falls down, he will be eaten by the animals below. He also wants to know if the emperor plans to move back into the prehistoric world. He can't figure out why the emperor wants to kill him on the tree, but he knows that if he does, the family won't be able to deal with it.