Spring. As Kinohata Mira enters high school she suffers a huge shock when she finds that the astronomy club she swore to join was gone. When Mira was a young girl she promised a certain person that they'd discover an asteroid, and that became her dream. Yet starting this year the school's astronomy club and geology club have been merged into the earth sciences club. She quickly joins and in the club room she finds three unique older students as well as...

Today the club is hosting a riverside barbeque to welcome in their new students! After enjoying a fun fulled day of rock hunting and star gazing, they decide to work on their activity report, Sparkle. While the others settle on the themes for their articles, Mira faces difficulty writing hers. While she managed to piece something together, her older sister, Misa, tells her she doesn't feel Mira in the writing. So when Ao asks Mira to draw an illustration for her article, Mira...