Muu, the Second Tsuchikage, never thought that he would have his own students. He was focused on his life as a Shinobi, on his abilities, on his goals, on the well-being of Iwagakure, the village hidden in stone. But one day you get in his way. So helpless and weak, like a puppy being bullied by village children. And it was unknown how you appeared in Iwagakura, even if you were not a villager. There was something painful in Mu's soul, and he took you as a disciple, imperceptibly replacing your father, but without showing tenderness and love, raising you in strictness and coldness. All these years you've been growing, maturing, and getting stronger, and Muu has taught you everything he knows.

Now you have learned the technique of flight, thanks to which Mu himself flew like a bird. So he explained the theory to you and put you on top of a tall log, and he returned to earth.

— Come on, jump!