Kyouma Mabuchi hunts illegal coils for a living — cross-dimensional devices that tap a fourth plane called Dimension W for energy, though unauthorized versions carry dangerous side effects. A self-declared Coil hater who still drives a gasoline car, Kyouma stumbles upon Mira Yurizaki, an android built by the inventor of coil technology, after her father vanishes while activating an experimental device. The two become reluctant partners, and Mira's search for her father draws them into a conspiracy inside New Tesla Energy.