Ever since they encountered aliens on the moon, humanity's technology has developed by leaps and bounds. Half a century later, even though most have it easy, Robby Yaji and Hacchi Kita cannot seem to catch a break in this advanced society. Robby—a man perpetually struck by misfortune—owes large sums of money to debt collectors due to his poor investments in shady get-rich-quick schemes, and Hacchi finds it difficult to get over the boredom of his mundane life. The two end up on an adventure of a lifetime when loan shark boss Yang sends Hacchi to collect the money Robby owes. Rather than pay up, Robby blasts off into space and heads to Isekandar, a planet that supposedly brings happiness to anyone who visits. Seeing a chance for some much needed excitement, Hacchi tags along with Robby on this journey filled with alien encounters, giant robot battles, and all sorts of troublemaking—all the while avoiding Yang and his cronies who are desperately combing the universe to find them.

Whether it is the future or the past it is the world of fantasy and horror hiding in the shadow of the demon city. In the city, consecutive mysterious incidents that cannot be solved by science have occurred. To solve the incidents, they gather three girl detectives possessing special abilities. Hayama Kotono. She is an orphan living in a convent. Shirafuji Natuski. She is Kotono's classmate and a pop idol. Hijiri Misaki. She is a mysterious girl who fights against nightmares of her previous life. Those who want to bring the Judgement Day to the world. Those who want to save the world. Which is justice, and which is evil? When Kotono encounters a boy who lost his memory, the wheel of the story begins to move but slowly. Then, solving the mysteries, the three girls will confront the fate that will influence the existence of the human beings. (Source: AnimeNfo)

One hundred years after their deaths, six legendary holy warriors are reborn to seek justice against the former comrade who betrayed them into the hands of an evil god! The six warriors search the feudal province of Edo questing for the last Saint Soldier, Haohmaru, and their sworn nemesis Shirou Amakusa. Will the followers of the divine light triumph over the forces of darkness, or is history destined to repeat itself? Before their hundred-year journey has ended, six samurai will prove that the only thing stronger than their holy blades is the steel of their wills! (Source: AniDB)

This two-part OVA is a series of shorts in relation to the School Rumble series. This OVA fills in gaps with new content between episodes from beginning to nearly the end. (Source: ANN)