Koharu (Sei Shiraishi) suggested to Matsuko (Anna Ishii), "Why don't you stop killing each other?" Promising not to follow the instructions of commander Alice (Yuno Ohara), and getting consent with certain conditions. And in the real world, Charlie Tango's Ichika (Azusa Ohara) and Futaba (Rina Kannan), Megumi Mitsu (Hina), Kitamoto (Ai Mikami), Minami (Aoi Uta), and Higashino (Momoko Tanabe) of Delta Tango. Koharu, who approached the story, succeeds in promising each other that they will not kill each other in "Girl Gun Fight". When the Girl Gun Fight begins, Alice notices the light bullets that

the players miss and the strange atmosphere ...!? On the other hand, the players gather in the classroom despite the fight and have a "commemorative party where no one dies". Start with…!?

Koharu (Sei Shiraishi) heard from a health teacher, Moriyama (Masanari Wada), that there is a warehouse behind a mysterious antique shop. After consulting with Akiho (Natsuki Deguchi), she secretly infiltrates Natsuna (Momoka Ito), who is preparing for the national athletics competition. The two of them sneaked into the store, but as expected, the store manager (Gaku Hamada) found out, and the homeroom teacher Hoshimiya (Aya Asahina) also reported and apologized. The two thought that the secret of the Girl Gun Lady was in the warehouse, and suggested to Natsuna, "Let's break into the Girl Gun Fight." Then, I talk to Alice (Yuno Ohara) in a parallel world, but I can't find a way to open the "bilibili wall" that surrounds the school ... On the other hand, Matsuko (Anna Ishii) is not the commander Bianca (Rio Teramoto) of Bravo Tango, but for some reason Alice offers a consultation- !?