About this season
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.
Episodes (13)
1. My First Mineral Hunt
8.5Aired 6 July 2025 • 24 min
High school girl Ruri meets graduate student Nagi while collecting minerals in the mountains.
2. The Value of Golden Color
8.0Aired 13 July 2025 • 24 min
Ruri is determined to find gold, but Nagi explains that it might not be as likely as she hopes.
3. The Lost Planet
8.0Aired 20 July 2025 • 24 min
Ruri meets Nagi's colleague Imari, and the three embark on a journey to find a lost mine.
4. Study of Sands
7.5Aired 27 July 2025 • 24 min
In search of sapphire, Nagi teaches Ruri how to study sand, but Ruri prefers to hunt on a bigger scale.
5. Worlds Seen and Unseen
7.0Aired 3 August 2025 • 24 min
Ruri, Nagi, and Imari head to the beach in search of agate, and Ruri learns about the long lifecycle of rocks.
6. A Closer Look into the Blue
7.5Aired 10 August 2025 • 24 min
Just as the group begins searching for sapphire on foot, Ruri uncovers a grave mistake that halts their plans.
7. Seaside Recycling Studio
7.5Aired 17 August 2025 • 24 min
Ruri finds sea glass on the beach and runs into her classmate Shoko, who has a secret passion for minerals.
8. The Golden Elegy
7.5Aired 24 August 2025 • 24 min
Ruri teams up with Shoko for a science project, which takes a turn when they discover a strange, orange rock.
9. Time Capsule of 1.9 Million Tons
7.0Aired 31 August 2025 • 24 min
Ruri and Nagi head out to hunt for opals but discover that the area has already been fully excavated.
10. Sentence to an Abandoned Railroad
8.0Aired 7 September 2025 • 24 min
Imari leads a hunt for manganese ore, when the group encounters a mystery along abandoned railroad tracks.
11. The Sapphire Cradle
7.5Aired 14 September 2025 • 24 min
When Ruri has trouble deciding on her future, she turns to her study of sapphire.
12. Memories Come with Rocks and Noise
7.5Aired 21 September 2025 • 24 min
When Ruri discovers her grandpa's old crystal radio, she's determined to restore it.
13. Look Up, Examine, Search! And Next!
7.0Aired 28 September 2025 • 24 min
Ruri, Shoko, Nagi, and Imari take a trip together, where they search for meteorite at a hot springs inn.