Once upon a time, there was a certain family having strong influence on the rule of the Imperial Court. They had their own might called "Kidou" and yet got hated because of the might itself. At last, the patriarch of the family was entrapped to his death, and all the family was doomed to ruin... The present day — the survived descendants of this family, now calling themselves "Kidousyuu" schemed to resurrect their murdered patriarch once again, and the ferocious evil spell went into action.

Rumi's met a lot of guys through her job, and it's probably fair to assume that most of them could be said to have some sort of problem, but a man who literally turns into a beast when he gets turned on may be outside of this perky call girl's field of expertise. Still, a little challenge every now and again stimulates the mind and makes life so much more interesting, so she's willing to give it a shot.

In the distant future, mankind has colonized other planets in the universe. While many planets lived in peace, the planet Jerra has been ravaged by decades of war. Geist is an M.D.S. (Most Dangerous Soldier), an enhanced human with unsurpassed combat capabilities and an insatiable lust for battle. Because of his uncontrollable nature, Geist is cryogenically frozen and locked in a satellite. Several years later, the satellite crashes and Geist wakes up from his sleep to engage in another war. This time, to help the army stop the planet's central computer from activating a doomsday device that will lead to total annihilation of all life on Jerra.

For one year, Master Swordsman Eiji Shinjo has been haunted by the memory of his battle with the renegade champion, Gaia - a battle that was cut short by the forces of the malevolent syndicate known as "the organization." Denied victory, Eiji left the tournament followed by his opponents mocking laughter. Worse still, Eiji walked away no closer to finding his long lost brother, Sho. But now, a mysterious warrior is hunting down the champions of the previous tournament and using their own moves against them - and it looks like that person may be Sho. Who is this powerful new foe and who is his next target? Eiji and Kayin, his closest friend and greatest rival, struggle to unravel the mystery before they, too, join the ranks of the defeated. The answer lies at the heart of the Organization and its plans for world domination. At last, the ultimate battle between the greatest fighters in the world will be decided. But if Eiji loses, his friends - Ellis - may Die...