High schooler Ruri Tanigawa loves shiny things. She loves them so much that she heads into the mountains to search for crystals herself—where she unexpectedly meets Nagi Arato, a graduate student studying mineralogy. As the pair start collecting minerals together, Ruri begins developing a genuine appreciation for science and the beauty of the natural world.

Miyari Nemotoas Ruri Tanigawa (voice)
Asami Setoas Nagi Arato (voice)
Yume Miyamotoas Yoko Imari (voice)
Misuzu Yamadaas Aoi Kasamaru (voice)
Momoka Terasawaas Maika Iwakumo (voice)
Megumi Toyoguchias Ruri's Mother (voice)
Shinji Kawadaas Shoko's Father (voice)
Saki Hayashias Shoko Seto (voice)
Hana Takedaas Shoko's Mother (voice)
Hina Natsumeas Nursery School Teacher (voice)