Sasshi and Arumi, instead of going back home, are transported to a Sci-Fi version of the Abenobashi shopping center. They find the Abeno Angels (who are really Mune-Mune, Sasshi's older sister Sayaka and Ms. Aki), a trio of scantily-clad space heroines who moonlight as Space Pirates! Sasshi and Arumi become pilots of a giant robot, followed by Masa-ji (as the old professor who never does anything) and Papan (as a robot), to defeat the oni who stole Arumi's panties and turned into a giant enemy robot! References to almost every cult giant robot and sci-fi anime series ...