Season 1

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

2025-07-06

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

2025-07-13

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

2025-07-20

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

2025-07-27

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

2025-08-03

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

2025-08-10

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

2025-08-17

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

2025-08-24

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

2025-08-31

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

2025-09-07

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

2025-09-14

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

2025-09-21

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

2025-09-28