Go! Go! Loser Ranger!

Fighter D is intent on beating the Ranger Force for real after the Sunday Showdown between the monsters and the Dragon Keepers is revealed to be a facade.

Fighter D's hostility towards the Ranger Force causes the Red Keeper to start doubting the monsters; D enters the recruitment exam incognito and joins Hibiki Sakurama and Yumeko Suzukiri.

Hibiki discovers Fighter D's real identity through his conversation with Yumeko. At the same time, D agrees to work with Yumeko and infiltrates the Red Garrison to steal the Divine Artifact, only to find himself in a predicament.

Jin Himura confronts the Red Guardian during the sacred banquet for first-class rangers; a conflict arises as Aran Hekiru, a blue third-class cadet, pursues Fighter D and discovers his link with Hibiki.

Fighter D infiltrates the White Dragon's Nest in disguise, but things do not go according to plan when he meets Sesera, Hibiki's older sister, and the other Rangers. On top of that, he discovers that someone unexpected is living in hiding.

Things get off to a bad start when Kai Shion, who has his own goal in mind, teams up with Fighter D for the final exam. They work together to take on Shun Tokita, who doesn't seem to want them to pass the exam.