Countries all over the world formed an alliance to counter the emerging enemy of mankind "Neuroi," whom only girls with special powers could counter. However, the Neuroi never appeared. Instead of fighting, the witches spend their days idly. This time following not only unit 501, but also unit 502 known as "Brave Witches!" The 2nd volume of the comical daily drama of the witches who do not fight Neuroi begins! (Source: MAL News)

After successfully holding off the invasion by Aftokrator, the Border Defense Agency prepares an away mission into the Neighbor's dimension. However, like in previous scouting expeditions, only A-rank teams are certain to secure a spot. As the B-rank wars continue, Osamu Mikumo and the rest of Tamakoma-2 quickly fight to the top in an attempt to obtain a promotion before the operation begins. Meanwhile, a new Neighbor ship approaches Border Headquarters. Noticing that the attackers are targeting the Border Expedition Ship, forces are hastily sent to combat them. However, with fewer squads available due to the proceeding rank wars, the organization is sent into disarray. This latest offensive from the Neighbors shrouds the fate of the all-important expedition ship in uncertainty.

Once, vampires and humans lived in harmony. Now, a young girl and a vampire queen will search for that Paradise once again. In the divided world of the future, two girls want to do the forbidden: the human wants to play the violin, and the vampire wants to see a wider world.

In the town of Kurouzu-cho, Kirie Goshima lives a fairly normal life with her family. As she walks to the train station one day to meet her boyfriend, Shuuichi Saito, she sees his father staring at a snail shell in an alley. Thinking nothing of it, she mentions the incident to Shuuichi, who says that his father has been acting weird lately. Shuuichi reveals his rising desire to leave the town with Kirie, saying that the town is infected with spirals. But his father's obsession with the shape soon proves deadly, beginning a chain of horrific and unexplainable events that causes the residents of Kurouzu-cho to spiral into madness.