Go! Go! Loser Ranger! manga volume 5 features story and art by Negi Haruba, the creator of The Quintessential Quintuplets.

It's the last day of the Ranger promotion exam. After the top five elite recruits joined hands against the rest, D rallied those who were left behind to form a team of his own...and they have a secret weapon that just might even the playing field, the "Burst Form"! A fierce battle breaks out over the "keys" that will determine which five candidates will advance, and convictions are put to the test. Will D finally be promoted to a full member of the Ranger Force and take his first steps toward defeating the Dragon Keepers?

Go! Go! Loser Ranger! manga volume 6 features story and art by Negi Haruba, the creator of The Quintessential Quintuplets.

The last day of the final exam that will decide the fate of the Ranger recruits has taken a dark turn at the unexpected appearance of the boss monster, Peltrola. With the sudden intervention of the Blue Keeper, D now finds himself stuck between a Dragon Keeper he despises and one of the bosses who betrayed him! Just what is D fighting for; in the end, who will he fight for? And who will survive the final exam?

Go! Go! Loser Ranger! manga volume 7 features story and art by Negi Haruba, the creator of The Quintessential Quintuplets.

D succeeded in making it through the final exam and achieved his goal of being promoted to a full-time Ranger... Even better, he defeated the Blue Keeper and stole his divine artifact. If only he didn't have to share credit with the boss monster, Peltrola. Now, as D enters the Green Squadron with his fellow recruit, Usukubo, he prepares to take down a new target: the Green Keeper! What's more, there seems to be another boss monster lurking around the neighborhood. It's time for a brand new undercover op. If D is discovered, it's over... And what's this about a series of mysterious disappearances around town?

Go! Go! Loser Ranger! manga volume 8 features story and art by Negi Haruba, the creator of The Quintessential Quintuplets.

While pursuing a lead on the mysterious disappearances, Green Squadron managed to infiltrate the “Academy of Dreams.” Though Usukubo and Hisui have both fallen under the boss monster Magatia's spell, due to his ignorance of school life, D held onto his sanity…but got himself expelled! Not so easily thwarted, he snuck back in, determined to shatter the illusionary world. Will he manage to defeat Magatia and force those who have retreated into a fake utopia to face reality?