Koharu (Sei Shiraishi) and Akiho (Natsuki Deguchi) finally infiltrated the warehouse of an antique shop run by a mysterious store manager (Gaku Hamada). Inside, it was as wide as a spaceship, and it was a strange space where the players who died in 'Girl Gun Fight' were lined up like stuffed animals. A light bullet is fired from behind Koharu and Akiho, who are angry, and Matsuko (Anna Ishii) is there. And Alice (Yuno Ohara) makes a certain decision ... Also, in the real world, the existence of Natsuna (Momoka Ito) was erased, and a sad reality awaited. Koharu goes to see the store manager with Akiho to check the warehouse, but the store's warehouse is just a storeroom, and the mystery only deepens.
On the other hand, in the parallel world, a new player will be added to Alpha Tango in place of Natsuna- !?

Matsuko (Anna Ishii) was a Girl Gun Lady ... She was Matsuko, who won the past 'Girl Gun Fight' and became a human from a commander on a sunny day, but in her new world, she had memories that she didn't know at all. She confesses everything, and before the 'final ceremony', she offers to find a plastic model 'girl armor' that can destroy the girl gun system for the surviving players. Koharu et al. Suspect that Professor Moriyama (Masanari Wada) is M Taro who made 'Girl Armor', and with the cooperation of Professor Hoshimiya (Aya Asahina), try to find out ...?