One day, Blue Cat and his friends accidentally encounter an alien girl named Lala in the forest. In order to help Lala return to her homeland, Blue Cat and his companions embark on various journeys to find the legendary planet "Ozma" at the deepest reaches of the universe. Along the way, they help the indifferent people on the planet restore the kindness and emotions buried deep within their hearts. This story reflects Blue Cat's unwavering determination and belief in pursuing his ideals, while promoting the true, good, and beautiful aspects of human nature.