Action, Comedy, Romance, Harem, Seinen, Adventure, Fantasy, Military, Drama, Mature, Isekai

Hell has paid a visit on Earth, but humanity isn’t going down that easily in this thrilling action adventure! One summer day in Tokyo, a gate suddenly opened up, pouring a slew of monstrous creatures and soldiers onto the unsuspecting citizens and slaughtering them. The gate connected Earth with an unknown world, creating a new kind of war. The event came to be known as the Ginza Incident. Now the Japanese Self-Defense Force has deployed some of its members through the gate, including otaku soldier Youji. Their mission is to find out as much as they can about the other world and stop the supernatural dangers from destroying Earth. But what lies on the other side of the gate may be more than these soldiers bargained for...