This is a story about the teenage fantasies of Asumi, a girl who wishes to become an astronaut, and of her friends.
One day, Lion's space vehicle fell from the sky and crashed, unfortunately killing Asumi's mother. Asumi then met the spirit of Lion, who told Asumi many stories of space. By listening to these stories, Asumi was inspired to realize her dream of becoming an astronaut.
Embracing her dreams in her heart, Asumi is now in third grade of junior high school. It is time to decide her path for the future...