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There is an ancient prophecy shared amongst the kingdoms of Earth - 2,000 years after their fall, the Earth Empire Bugnarak will once again rise up to kill all humans. However, five kings and their guardian deity, King-Ohger, will stand up to face them. This is the story of kings who will defend the Earth, as well as a Coming of Age Story for one young man who will achieve kingship henceforth.

Seijiro Ito possesses good looks, but also has an overinflated ego. He gets involved with five different women. Rio Yazaki is one of the women involved with Seijiro Ito. She wants to revive her career as a screenwriter, by using other people's unhappiness.

Following the death of the second Tokugawa shogun, it is revealed that he was poisoned by retainers of his son Iemitsu in hopes of gaining him the shogunate despite the stammer and birthmark which undermine his respect. Iemitsu and his brother Tadanaga become bitter rivals for the shogunate, and the land is split into factions, eventually erupting into warfare. Iemitsu's mentor, his fencing instructor Yagyu, is fixated upon securing Iemitsu the shogunate and ends up betraying everyone, even his own family, in pursuit of the goal.