A childhood promise to find an asteroid together becomes the thread that ties five girls to each other instead, and the show lets that quiet realization breathe. Doga Kobo's animation turns constellations and mineral formations into something genuinely beautiful without ever stopping to announce how pretty it is. The scattered pacing keeps you grounded in small moments, a girl recognizing a rock formation, another solving a math problem on the roof, because that's what actually matters when you're chasing something you believe in.

Mira carries a childhood promise into high school: someday she'll discover an asteroid with the boy she met at a campsite years ago. When she joins the astronomy club, she's ready to pursue stargazing seriously. Then an unexpected merger happens. The astronomy club combines with the geology club, creating something entirely new: the astrogeo club. At Hoshizaki Academy, Mira signs up for the combined club anyway and is surprised to be reunited with Ao, the friend who first showed her the wonders of the night sky. Together with their new clubmates, the two set out to keep their old promise of finding an asteroid. The result is a gentle slice of life comedy about school club days and a shared dream among the stars.