A long time ago, there was a Mochi Star in the universe. On the Mochi Star resided a group of Mochi, who led peaceful and happy lives. One day, a secret treasure fell onto the Mochi Star and triggered a large-scale invasion of alien clans who oppressed the Mochi residents. The Mochi fought bravely but were overpowered. Watching the weak Mochi residents fight fearlessly, the gods were touched and decided to go to Mochi Star to help them fight against all kinds of alien beasts.