The battle with the monsters is in full swing! The Hero Association has thrown the combined forces of the best of the best from various classes into the fray. The heroes of class S have penetrated the farthest into the dungeon, where villains from the Monster Association are holed up. After breaking through the first line of defense of the monsters, the renowned professionals intend to scour the filthy dungeon from top to bottom. Bright Flash is attacked by several strong enemies at once, but the hero, who ranks in the top twenty in class S, is no pushover. It is much harder for Baby Emperor, another high-ranking hero. He faces one of the strongest fighters of the Monster Association – Phoenix. At some point, the situation escalates so much that the hero, who looks like a little boy, has to play his last trump card – a gigantic robot…
