This story takes place in a world that is not similar to ours, but has a lot in common, an terribly much in common... A world filled with heroes is collapsing, the idols of many people are dying one after another everywhere from an unknown disease. Scientists believe that a virus has appeared that affects only people with the X gene, a gene that grants “superpowers,” although all sorts of professors are accustomed to calling them people with positive-special mutations. It’s definitely hard to say, but about heroes... It seems the world will be forced to forget about heroes... The idols of hundreds of people are simply powerless, not in the face of the danger of losing to a villain or allowing the death of ordinary citizens, as many might think, but in the face of an ordinary mutation of the flu...