En, Kai, Shin, Yoku and Ryu were five ordinary students at Sankai High School - that is, until the alien Brave Seijin forced them to become the heroes known as Dagwon to defend planet Earth! Aliens from the space prison Sargasso have targeted the world, and since there's no time to summon Dagwon from the aliens' home planet, the duty falls upon these five unassuming teens. With newfound mecha power and animalistic machines, Dagwon will defend Earth from mummifying monsters, giant ants, and more!
Both shows focus on a group of underage humans who use bracelets to mystically don robotic armor, which in turn allows them to merge with giant robot bodies to fight the forces of evil. These giant mecha bodies transform into vehicles, which are piloted/driven by the humans who merge with them. There are also strong similarities in the design aesthetics of the giant robots in each series.