Created from the aftermath of the last great battle of the gods, Lodoss and its kingdoms have been plagued by war for thousands of years. As a quiet peace and unity finally become foreseeable over the land, an unknown evil begins to stir. An ancient witch has awakened, bent on preserving the island of Lodoss by creating political unbalance throughout the many kingdoms and keeping any one from maintaining central control. Only a mixed-race party of six young champions, led by the young warrior Parn, stand between this new threat and Lodoss' decent back into the darkness of war and destruction.

Satou Tatsuhiro, a 22 year old young man, is a NEET (Not in Employment, Education, or Training) and a hikikomori (meaning acute social withdrawal). He believes everything around him is a conspiracy, including the reason why many people, himself included, become hikikomori. Due to this, Satou creates a strange conspiracy theory which includes the Nihon Hikikomori Kyōkai (NHK), a secret organization with the intention of producing a hikikomori filled world. Satou intends to break free from the NHK's clutches, but cannot, since he finds it too frightening to go outdoors by himself; that is, until he meets Misaki Nakahara, who selects Satou for her "project" that she claims will cure him of his hikikomori ways.