It's the 21st century. Survival games continue to fascinate fans all over the world. It has become a national sport in Japan as well. The stage is Shodoshima. Mari Fujisaki, a first-year high school student will once again aim for the top of the nationals with her friends in a survival game that she thought she all but gave up on. The summer really starts to heat up for these girls who are training for survival... it's guns and girls! (Source: Kadokawa, translated)