Koharu (Sei Shiraishi), a sober girl who had no place to stay at school, has only one hobby to make plastic models. When she enthusiastically talks with Kaoru Moriyama (Masanari Wada), a health teacher who secretly hides behind her students and makes plastic models, her student council president Matsuko (Anna Ishii) is present and she dismisses her as 'crap'. It will be done ... Then one day, Koharu stopped by at a mysterious antique shop on his way home from school and bought her 'change her life' plastic model from her store manager (Gaku Hamada). That night I was crazy about it ... I was summoned to a mysterious parallel world when I noticed it-- !? In front of me, Koharu's plastic model 'Alice' (Yuno Ohara) !? The survival game 'Girl Gun Fight' that cannot escape begins without it.