2018年，10月住在某地方都市的少女们，举行了某个仪式。她们是“矿石收音机研究会”。那是性格开朗的女孩子土宫明日架，与同所高中的朋友们所成立的社团。这个仅仅只是充满了都市传说味道的仪式，却在数种条件偶然重合之下，演变成了无法一笑了之的事态——。...

A strange family: 17-year-old Phil lives with his mother and twin sister in an old mansion on the outskirts of town. When he returns from summer camp, the mood in the mansion has soured somehow. Phil ...