Lizel, the gentle noble from another world, generally spends his time relentlessly pursuing his hobbies and challenging himself inside labyrinths alongside his party. This time, Lizel, Gil, and Eleven stumble upon an arm wrestling contest for a prize that Lizel desperately wants: a new book. Will he be able to convince Single Stroke Gil to enter the contest for him? And later, when a sudden horde of monsters appears near Marcade, Lizel notices that this isn't any ordinary invasion: these monsters are strategizing and targeting certain areas of the city. Will C-Rank Lizel be able to convince the fellow Adventurers defending Marcade to change their strategy in the face of such an abnormal invasion?