Mankind's first contact with Collapse and Counter-Collapse technology could be traced back to the exploration of unknown life forms in 1905. People believed that such technology could completely revolutionize the world, but remained oblivious to its specific purpose...

Until 2030, when a series of events (known as the First Beilan Island Incident) triggered by a few middle-schoolers' misadventures caused a large-scale leakage of Collapse Fluid, the essential material of this technology. Since then, mankind finally realized what Collapse actually entailed...