Souryuuden

The four Ryudo brothers try to live in modern Japan while carrying an extraordinary inheritance. Their connection to the Dragon Kings grants them remarkable strength and speed, but extreme pressure can also turn them into immense dragons whose power is difficult to control.

Influential enemies see that inheritance as something to capture and exploit. Pursued by opponents with military resources and scientific ambitions, the brothers must protect one another while confronting conspiracies that threaten their freedom. Their greatest defense may also become a danger when their transformations overwhelm them.