Satoshi "Sasshi" Imamiya believes his life is in shambles, as only a 12-year-old can. Having lost his card collection, his childish dilemmas worsen when he learns that his childhood friend, Arumi Asahina, will be moving away. Suddenly, their issues are dashed aside for the surreal, and they find themselves transported away through bizarre worlds of science fiction, magic, and war. Any attempt to escape only catapults them into another alien land. Soon, the two come to a realization: every world is just a reimagining of their hometown. But there are two unfamiliar faces—the voluptuous Mune-mune and the elusive blue-haired Eutus—and they just might be the key to escaping their predicament. Abenobashi Mahou☆Shoutengai follows Sasshi and Arumi's comedic exploits as they desperately attempt to return home. However, when the pair unravel a tale spanning generations, they begin to wonder if the cause of their situation is more personal than they thought. Is returning home truly what they desire? Childhood friends Arumi and Sasshi are residents of the Abenobashi commercial district in Abeno-ku, Osaka. After an accident, they find themselves transported to an alternate sword and sorcery world. Their attempt to get back to reality finds them traversing a series of nonsensical worlds built on science fiction, war, fantasy, dating sim games and American movies. Each alternate Abenobashi is a surreal manifestation of Sasshi's otaku interests, populated by analogs of the protagonist's relatives and acquaintances and a blue-haired stranger known as Eutus.