Checkmate Betrayed

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 ...?