Japan, 2020, a few days before the opening of the Tokyo Olympics. Although she should be studying for her final exams, Kokone, a schoolgirl who lives in a small town with her widowed father, a ...

A scientist uses his invention - the "Menger Sponge" - to capture the energy of a dead child's spirit in an old building. In trying to determine why the energy of the ghost does not dissipate, ...