In the year 20XX, agents Reiji Arisu and his female partner Xiaomu are members of a secret government agency known as Shinra. The two are tasked with investigating paranormal activity as well as spirit and otherworldly disturbances. Both agents are on investigation of a "sleeping sickness" that is occurring in the Shibuya district of Tokyo, Japan, but the two stumble upon a terrorist organization known as Ouma, with one of its members being Reiji's archenemy Saya from the past ten years. Soon after, heroes and villains from both past and future worlds appear in the present, and it is up to Reiji and Xiaomu to lead the heroes to defeat the villains and save the multiverse.
—Anonymous