12화: 루리가 할아버지 유품 중 크리스탈 라디오를 발견하고 친구들과 함께 이를 만들어 보려 한다.

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)