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.+ More
Recommended for you
Magical Circle
TV
24m
YuruYuri: Happy Go Lily ♪♪
TV
23m
Saint☆Young Men (Movie)
Movie
89m
Wotaku ni Koi wa Muzukashii OVA
OVA
23m
Goodbye Mr. Despair OAD
OVA
25m
Broken Blade 5
Movie
47m
Haré+Guu
TV
23m
Jormungand
TV
24m
The Devil is a Part-Timer!
TV
24m
Eden of The East
TV
23m
K-On!!: Keikaku!
Special
23m
Michiko & Hatchin
TV
22m
91 Days
TV
24m
