The preparations for the Ichihanaransai are over and the time for the festival itself has arrived. The hustle and bustle of excited people fills Academy City. And at the same time... An incident has begun in the underside of the city. Monsters are gathering around the immortal girl named Fräulein, who has wandered out of Aleister's fortress: the windowless building. Many simultaneous battles between these various "strongests" occur and the storm created by these monsters wraps itself around Academy City as the Ichihanaransai takes place. An exciting new volume!