Tetsuo Sakaguchi

In the middle of class at a certain school, Rumi Yokoi, a diligent student, has her in-class life turned upside down when her desk mate Toshinari Seki begins to play by himself at his desk in class. Although Rumi is irked by Toshinari's distracting yet intricate playtime, she finds herself being drawn into his interesting hobby. Never being able to focus, Rumi observes Seki's stunning ways of slacking off in class.

Two worlds exist, unaware of the other`s existence. These worlds survive by competing for the use of mana. The most important beings in these worlds are known as the "chosens". These chosens must go on a journey to awaken the sleeping Summon Spirits, defeating the Desians, and restoring mana. Lloyd Irving and his friends Colette Brunel, the Chosen of Sylvarant, and Genis Sage, the smartest kid in Iselia set off on a journey with Kratos, a mysterious mercenary and Raine, Genis` sister. Along the way, they make more friends and discover the truth behind the World Regeneration. Based on the video game of the same name.

R.D. is a delivery boy who works for a company called Mach Storm in order to earn money to search for the legendary Alpha Zoid. A Zoid that he heard rumours about from his dad that he passionately believes in. Mach Storm also doubles as a Zoid Battling team. In R.D.'s first Coliseum Zoid Battle, he encounters a team that can fuse Zoids. R.D. soon discovers that he has a Zoid that can computably fuse with his Zoid, Liger Zero. After this happens R.D.'s adventure to discover the truth about the Alpha Zoid begins.