My First Mineral Hunt
E1
High school girl Ruri meets graduate student Nagi while collecting minerals in the mountains.
The Value of Golden Color
E2
Ruri is determined to find gold, but Nagi explains that it might not be as likely as she hopes.
The Lost Planet
E3
Ruri meets Nagi's colleague Imari, and the three embark on a journey to find a lost mine.
Study of Sands
E4
In search of sapphire, Nagi teaches Ruri how to study sand, but Ruri prefers to hunt on a bigger scale.
Worlds Seen and Unseen
E5
Ruri, Nagi, and Imari head to the beach in search of agate, and Ruri learns about the long lifecycle of rocks.
A Closer Look into the Blue
E6
Just as the group begins searching for sapphire on foot, Ruri uncovers a grave mistake that halts their plans.
Seaside Recycling Studio
E7
Ruri finds sea glass on the beach and runs into her classmate Shoko, who has a secret passion for minerals.
The Golden Elegy
E8
Ruri teams up with Shoko for a science project, which takes a turn when they discover a strange, orange rock.
Time Capsule of 1.9 Million Tons
E9
Ruri and Nagi head out to hunt for opals but discover that the area has already been fully excavated.
Sentence to an Abandoned Railroad
E10
Imari leads a hunt for manganese ore, when the group encounters a mystery along abandoned railroad tracks.
The Sapphire Cradle
E11
When Ruri has trouble deciding on her future, she turns to her study of sapphire.
Memories Come with Rocks and Noise
E12
When Ruri discovers her grandpa's old crystal radio, she's determined to restore it.
Look Up, Examine, Search! And Next!
E13
Ruri, Shoko, Nagi, and Imari take a trip together, where they search for meteorite at a hot springs inn.