The Earth in the far future, where humanity no longer exists. Cats that survived in the debris left behind by humanity have evolved into intelligent beings. The three cats, Kitz, Tutti, and Pepe, are working as cleaners at NYASA. Today’s mission is cleaning up space junk. But these unpredictable street cats skip their work and fly to the moon! The great adventure of the three cats crisscrossing space on Galaxy Sweeper, the space junk cleaning shuttle!