Ep. 8: Shoko and Ruri investigate water quality and discover orange crystals at an abandoned factory.

8

Shoko conducts water quality tests for a school science project, with Ruri joining her efforts. During their sampling, Shoko discovers an orange crystal but subsequently loses it. Meanwhile, Yoko performs similar water tests to identify a new fluorite deposit. These investigations eventually guide the group to an abandoned factory. Inside the facility, they locate rare orange zincite. This mineral serves as a decorative item and symbolizes the friendship between Shoko and Ruri. The narrative focuses on their scientific exploration and the discovery of these specific minerals within the industrial setting.