An anime series directed by Kenichi Yatani and produced by Gonzo, GREE, and Dentsu aired from April 6 to July 7, 2013.

[8] Carl Kimlinger of Anime News Network gave the series an overall C+ rating.

[9] He gave credit to both director Kenichi Yatani and the character designs of Takaharu Okuma for crafting a light-hearted adventure with an "intensely cute" female cast that delivers a "pleasing dry sense of humor" but found it throwaway with its ongoing story using "musty RPG plotting" and its overall charm being a detriment to itself, saying "That frothiness is both Leviathan's great strength and its ultimate weakness.

It's effortlessly fun to watch, but also about as memorable as, well, something that I can't quite remember right now.

"[9] Stig Høgset, writing for THEM Anime Reviews, heavily criticized the series for being a poor adaptation of a fantasy RPG game that puts an overreliance on moe designs and fanservice, while the overall plot and characters get little development to engage viewers, concluding that its "A failure in every single aspect of what makes a show good, and I've seen a lot of relatively average fantasy anime that at least managed to be entertaining.