Go! Go! Loser Ranger! 3

In their shared quest to end the ongoing war, Hibiki Sakurama, a Ranger, and D, a menacing monster, have come to a mutual understanding. While Hibiki is determined to revolutionize the Ranger Force from the outside, D is equally resolute in crushing it from within. D has once again infiltrated the ranks of the Ranger Force by switching places with Hibiki. However, the true challenge has just begun. In order to gain access to the Dragon Keepers, D must first pass the rigorous Ranger training. Yet, as Hibiki's sister unexpectedly pays a visit and a mysterious monster is discovered in D's closet, keeping his true identity a secret becomes an even greater challenge. In the heart of the Ranger Force, discovery means certain death.