The military fantasy series begins when 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 a replacement for Japan's military 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.
Itami is a year-old otaku and JSDF soldier. After successfully escorting hundreds of citizens to safety during the attack on Ginza, Itami is promoted to the rank of first lieutenant and tasked to investigate the other side of the Gate. He is a certified ranger and special forces personnel within the JSDF and while he is notable for being a slacker, he can be quite capable when under stress. Post with 0 votes and 22 views.
Originally, it was serialized from to on the user-generated novel publishing website Arcadia until it was acquired by publisher AlphaPolis in A manga adaptation illustrated by Satoru Sao began in July , and three spin-off manga began in The series has been licensed by Sentai Filmworks in North America.