(W) Quantum (A) Nori Kazato, Hana Amano After saving the world from the Demon Lord, the Hero, Leo, discovers that there isn't a place for him in it anymore. The incredible strength that made him humanity's greatest asset during the war is just a terrifying threat in times of peace, and he soon finds himself shunned from human society. But if the forces of good won't have him, that means it's time for him to apply elsewhere-for a job with his former enemy, the Demon Lord's Army!

(W) Quantum (A) Nori Kazato, Hana Amano Leo, the strongest hero, is reemployed in the Demon Queen's tattered army! Just as he is about to begin the reconstruction, two of the Four Generals go AWOL! It's time for Leo to put his accumulated knowledge and martial prowess to work and bring about some real innovation, which amounts to...millennias' worth of experience?! What is the secret of the mightiest champion?

(W) Quantum (A) Nori Kazato Leo has defended humanity for three thousand years as the world's strongest hero, but the humans have finally renounced him, and he's quit his job for good. Now free of his past burdens, Leo plans to hand the philosopher's stone over to the Demon Queen as a show of good faith-but little does he know it will be the cause of a terrible conflict?

(W) Quantum (A) Nori Kazato, Hana Amano Behind the incident of blackened wyverns attacking a human town lies the curse-maker Canaan and a reawakened member of the Demon Heart series-Leo's brother, Virgo. Leo is determined to stop his sibling before he wreaks any more havoc, so he seeks him out for a confrontation?

(W) Quantum (A) Nori Kazato, Hana Amano In order to find out the cause of water pollution in the Demon Realm, Leo and Mernes head off to investigate Lake Amia and its resident water spirit, Undine. But one thing stands in their way-the legendary 'Demon King Slayer,' who swears to protect Undine at all costs! Just who is this mysterious foe?! Meanwhile, Demon Queen Echidna puts her plan into motion, donning a perfect disguise to confer with Leo about her troubles…