Synopsis
When Demon Queen Echidna begins her invasion of the human realm, the people turn to the hero Leo Demonheart to protect them. Blessed with insurmountable power, Leo easily repels Echidna's army, thereby saving the world. But instead of gratitude or admiration, Leo is met with disdain and scorn from his fellow humans, who fear his overwhelming strength and believe that it may eventually cause humanity's demise.

Banished from the kingdom he once called home, Leo wanders aimlessly throughout the land until, one day, he hears rumors of Echidna's efforts to rebuild her army. Hoping that demonkind might accept him as an ally, he returns to the demon queen's castle and offers Echidna his help.

Naturally, Echidna immediately rejects him. Still, not all hope is lost, as Leo manages to convince Echidna's four generals to let him secretly work under their supervision. Donning the identity of a masked dark knight named Onyx, Leo solves the demon army's problems one by one—gradually improving the quality of life around the castle. Above all else, however, Leo wants to accomplish one goal: to learn why Echidna started the war in the first place.

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Source (Season 1)
Video: (21 crf, VerySlow) (Overall Bitrate: 2 234 kb/s) [[Moozzi2 S1]](https://nyaa.si/view/1630379) (15.8 GiB)
Audio(Opus): ENG, JPN (Stereo 192 kb/s)
Subs: Chihiro [Signs & Songs, Dialogue]

OVAs subs were timed to frame and restyled to match the series. ENG Audio for OVA's is blu ray. Trailers were sourced from Blu ray and added translation and typesetting.
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Plex Users (Click to Enlarge)

From now on i will be including trailers and OP/ED when available in the other and Trailers folder. DO NOT rename the folders else plex wont recognize the folders. If you already have this anime on plex you will need to refresh metadata to get the extras/trailer icon to appear. Make sure to be using the new plex series scanner else this will not work. Now you'll be able to watch the trailer/NCs without ads on youtube and your friends can watch it too.