第12話: ルリは祖父の遺品の中からクリスタルラジオを見つけ、友人たちとそれを自作しようと試みる。

12

Among her grandfather's old things, Ruri finds a contraption of copper wires and crystals. Nagi identifies it as a crystal radio. Ruri, Shoko, and new friend Aoi try to recreate it, but struggle to find the right mineral for the detector. A germanium diode works, confirming the build is correct. A nearby shrine with connections to Ruri's family offers better reception. (Source: Wikipedia)