Okinawa. An ordinary senior high school student, Kio, meets an alien girl who has cat ears and a tail who came to Earth so that she could learn more about it. In the end, he decides to bring her home. Howeve...

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 T...

In August of 20XX, a portal to a parallel world, known as the "Gate", suddenly appeared in Ginza, Tokyo. Monsters and troops poured out of the portal, turning the shopping district into a bloody inferno. The...