[DeepL Translation - needs review] Introduction to Volume 1: In the year 20XX, a "gateway to another world" suddenly opened in Ginza, Tokyo. Invading through the gate were forces from "another world" and other strange creatures. The Ground Self-Defense Force (GSDF) fights them off and enters the "special area" on the other side of the gate. Second Lieutenant Yohji Itami (33), an otaku Self-Defense Force officer who does not look like a Self-Defense Force officer, leads his men on a reconnais...
