A gate appears in Tokyo's Ginza district sometime in the 21st century. From the gate pours out monsters, knights from middle-age Europe, and other fantasy-like beings, and they kill many of the citizens of Tokyo. This event is known as the Ginza Incident. The government sends a small group of soldiers from the Japanese Self-Defense Forces to the alternate world beyond the gate. Led by otaku soldier Youji, they find that the villages in the world are being attacked by a dragon. An elf girl who is a survivor from the dragon's rampage joins the group in their travels across the dangerous new world.

The story doesn't belong to me I'm just sharing it here.

this is the original light novel

The Flame Dragon was a force which could not be resisted by humanity, and people the world over considered it a natural disaster, much like an earthquake. Therefore, all people could do in the wake of the tragedy which the Flame Dragon brought was sigh and mutter, "Such misfortune". They felt it was sent by the gods to torment humanity, much l


Chapter 48 - 11 just ignor this chap