S1 E1 • My First Mineral Hunt

High school girl Ruri meets graduate student Nagi while collecting minerals in the mountains. Source: Crunchyroll

Première diffusion : 6 juillet 2025

S1 E2 • The Value of Golden Color

Ruri is determined to find gold, but Nagi explains that it might not be as likely as she hopes. Source: Crunchyroll

Première diffusion : 13 juillet 2025

S1 E3 • The Lost Planet

Ruri meets Nagi's colleague Imari, and the three embark on a journey to find a lost mine. Source: Crunchyroll

Première diffusion : 20 juillet 2025

S1 E4 • Study of Sands

In search of sapphire, Nagi teaches Ruri how to study sand, but Ruri prefers to hunt on a bigger scale. Source: Crunchyroll

Première diffusion : 27 juillet 2025

S1 E5 • Worlds Seen and Unseen

Ruri, Nagi, and Imari head to the beach in search of agate, and Ruri learns about the long lifecycle of rocks. Source: Crunchyroll

Première diffusion : 3 août 2025

S1 E6 • A Closer Look into the Blue

Just as the group begins searching for sapphire on foot, Ruri uncovers a grave mistake that halts their plans. Source: Crunchyroll

Première diffusion : 10 août 2025

S1 E7 • Seaside Recycling Studio

Ruri finds sea glass on the beach and runs into her classmate Shoko, who has a secret passion for minerals. Source: Crunchyroll

Première diffusion : 17 août 2025

S1 E8 • The Golden Elegy

Ruri teams up with Shoko for a science project, which takes a turn when they discover a strange, orange rock. Source: Crunchyroll

Première diffusion : 24 août 2025

S1 E9 • Time Capsule of 1.9 Million Tons

Ruri and Nagi head out to hunt for opals but discover that the area has already been fully excavated. Source: Crunchyroll

Première diffusion : 31 août 2025

S1 E10 • Sentence to an Abandoned Railroad

Imari leads a hunt for manganese ore, when the group encounters a mystery along abandoned railroad tracks. Source: Crunchyroll

Première diffusion : 7 septembre 2025

S1 E11 • The Sapphire Cradle

When Ruri has trouble deciding on her future, she turns to her study of sapphire. Source: Crunchyroll

Première diffusion : 14 septembre 2025

S1 E12 • Memories Come with Rocks and Noise

When Ruri discovers her grandpa's old crystal radio, she's determined to restore it. Source: Crunchyroll

Première diffusion : 21 septembre 2025

S1 E13 • Look Up, Examine, Search! And Next!

Ruri, Shoko, Nagi, and Imari take a trip together, where they search for meteorite at a hot springs inn. Source: Crunchyroll

Première diffusion : 28 septembre 2025