Randou Rino is a young girl with a head full of air and a talking puppet on her hand. She is accepted into the illustrious Gokujou all-girl's school, and is summarily, almost curiously, accepted as part of the even more illustrious Gokujou Student Council, who has more power and business ventures than most large businesses. Now a part of the student council, she befriends the talented members of the Gokujou Student Council, leaving one to wonder how a girl with seemingly no talents or redeeming qualities would get chosen for such a group. (Source: ANN)

Kintarou Ooe is a specialist in part-time work, riding all over the highways and byways of Japan on his trusty steed, the Mikazuki 5, and finding employment wherever he can. His adventures bring him knowledge and experience that can't be taught in a classroom, from political corruption to the delicacy of a young woman's heart. With nothing but the open road before him—not to mention the many beautiful women along the way—Kintarou pursues his spirit of education while attempting to hold down his various odd jobs, however undignified they may be. As he learns from each task he takes on, who knows what could happen? He might even be able to save the world one day. One thing is for sure—this will all be very educational!

After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire. (Source: ANN)

The year is now 2041 AD. A new enemy called Zeravire suddenly appears in the solar system, destroying all military installations it comes across. However, a wealthy man named Klein Sandman is already aware of this planned invasion and had been secretly preparing his army for battle. His trump card is Gravion, a giant robot that utilizes gravity as its source of energy. Meanwhile a young man named Eiji secretly enters Sandman's base in search for his missing sister. It is there that he meets another young man by the name of Toga... These two must now fight together with four other individuals aboard the super robot, Gravion to fend off the Zeravire threat. (Source: ANN)