65 million years ago, the knights of the Ryusoul Tribe were selected to participate in a war campaign against the dictating Druidon Tribe who sought to rule Earth. But the Druidon's war campaign was halted by the meteor that brought the age of the dinosaurs to an end, forcing them to flee into space. Meanwhile, the Kishiryu were placed in a deep sleep as a failsafe should the Druidon return. The chosen knights choose to live in peace while passing their mantle down across generations. In the present day, the Druidon return to reclaim Earth as the current generation of knights, the Ryusoulgers, battle them with the support of Ui Tatsui and her father Naohisa Tatsui.

Sara, a young actress, is able to land the leading role in big theater play, but soon learns that somebody or something is trying to end the production at all cost, which puts Sara in deadly danger.

Mirai does nothing but plays games every day. Her brother supports and believes in his sister, and he is a researcher who develops future tools. Mirai exploits that and the whole family experiences a series of troublesome and hilarious events.

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