In present day demon society, the Delzogade Demon King Academy trains young demons descended from the Demon King's bloodline, waiting for the Demon King to reincarnate. Two new students, Anos Voldigoad and Misha Necron, are bullied by Zepes Indu, an arrogant royal. Anos, who is secretly the reincarnated Demon King, easily humiliates him by repeatedly killing and resurrecting Zepes until he surrenders. Anos invites Misha to his home, where it is explained by Anos' parents that he used his magic t
2,000 years ago, Anos, tired of war, made a deal with the human hero Kanon to sacrifice his life to separate the Demon, Human, Spirit and God realms for 1,000 years so peace could flourish. In the present, Anos learns he was deemed a misfit because the history of the Demon King has been grossly misinterpreted. He proves his intelligence by correcting the spell of his teacher, Emilia Ludowell, doubling its power. He then proves his power by overwhelming Sasha Necron, Misha's arrogant sister, with
Ivis Necron, one of the seven Elder Demon Emperors Anos created from his blood, now runs the academy as the seven deans. Anos realizes Ivis does not remember him, so he attempts to sends Ivis back in time to retrieve his memories. However, Ivis decides to remain neutral. For the next academy challenge, students are told to collect magic items from a castle which is actually Anos' home from 2,000 years ago. He decides to collect a scepter at the lowest level. After collecting the scepter, he allo
When Sasha was a fetus, Ivis split her into two babies so when they turn 15, they would fuse into a single more powerful demon. Anos catches up with Sasha who reveals she actually wants to save Misha. Anos reveals that if he sends them back in time, they can fuse with their unborn fetuses so they will be born as true twin sisters. Anos is then stabbed by Ivis. Anos activates the time spell only to be blocked by Eugo La Raviaz, Guardian God of Time. Fusing himself with Ivis, he seemingly kills An
In the past, a swordsman, Shin Reglia, won a great victory for Anos and was granted the ability to reincarnate. In the present, Emilia announces that a royal student famous for his sword skills is transferring into the academy. Misa Ilioroagu, a classmate, informs Anos she is a Unitarian. Anos is intrigued to learn Melheis Boran, another Elder Demon Emperor, is a Unitarian. Anos learns Misa's royal father has not spoken to her in years. Anos decides to let Misa and her Unitarian classmates join
After the duel, Anos invites Lay and Misa to his home along with Sasha and Misha for dinner. There, he welcomes Lay and Misa in his team, while his parents enthusiastically celebrate his victory. At school, Emilia announces that two students have been chosen as competitors for the magic sword tournament: Lay and Anos. Anos suspects there is some kind of ulterior motive. Later, Anos meets Melheis Boran, one of the Seven Elder Demon Emperors, who claims that while he believes that his memories wer
Anos easily defeats Krut, which angers Emilia. This is followed by Lay winning his match. Backstage, Anos and Lay confront each other where Anos notices something is wrong. After he wins his next match, Anos gives his mother his sword. He and Misa then head to the hospital. There, they meet Lay's adoptive mother, Sheila, who has Spirit disease. She reveals Lay is being controlled by the Royalists. Afterwards, Misa volunteers to help her. Meanwhile, Emilia attacks Anos' mother and the Unitarian c
Before the duel commences, special rules are implemented which impact both Lay and Sheila. Lay praises Anos for his ability to fight despite his magic being drained. However, he decides to fight on his own terms, which allows them to go all out. Ultimately, Anos is victorious. It is then revealed that Melheis was the mastermind behind the tournament. Anos is challenged by Melheis, Gaios Anzem, and Ydol Anzeo. However, Lay takes out Gaios and Ydol. When confronted, Melheis reveals he has Sheila,
In the past, Anos told Kanon that he wanted to end the war. However, he was forced to injure Jerga during the confrontation. In the present, the students are told they will have inter-academy classes in the Human Realm. Anos, Misha, Sasha, Lay, and Misa have a training match during study hall. Later that day, Anos has a conversation with Melheis. Afterwards, he gives Lay a sword that belonged to someone he knew. Three weeks later, the students head to Gairadite for the inter-academy classes. Ano
Inside the Hero Academy, Revest Aynie, a third-year student, confronts Anos about how he does not recognize him as the reincarnated Demon King. During the first day of the inter-academy classes, a demonstration of re-creation is held. The Hero Academy's representative, Ledriano, easily performs the task, while Revest struggles to do so. Anos then reveals that the Hero Academy rigged the demonstration. Later that night, Ivis tells Anos some new information he uncovered during his investigation. A
During the next round of the inter-academy exams, Anos' team notices that the Hero Academy students have put up a barrier that is enhancing their power. Misha decides to build a castle in the center of it. Anos then encounters another student who is supposedly Kanon's reincarnation named Zeshia Kanon Ijaysica. Meanwhile, Sasha and Lay challenge and defeat Laos and Heine Kanon Iorg, respectively. Afterwards, Anos takes on Ledriano and Zeshia where the city gives them their energy in order to empo
Eleonore reveals she was created with a Taboo Magic spell. As such, she is Human Magic. Anos then frees her so she can save the Human Academy students. Afterwards, Eleonore reveals the truth about the creation of the Hero Academy, the students, the origins of the voice he previously heard, her existence, and how Kanon was killed. Just as Anos is about to grant Eleonore's wish, they are confronted by a clone of Diego. Suddenly, three of the Elder Demon Emperors show up with a mysterious figure, w
Lay reveals to Anos the truth as to why he rewrote history following his death. Afterwards, Anos challenges Lay to a fight. During the fight, Anos takes out six of Lay's seven sources. However, Anos allows Lay to defeat him in order to stop the humans' hatred of demons. Refusing to accept the outcome, Diego tells the Zeshia clones to self-destruct. When Eleonore tries to reason with him, Jerga arrives in the form of Sacred Magic. He is then confronted by Lay and the fused Misha and Sasha. When J