After being flushed down a toilet, 15-year-old Yuuri Shibuya is transported to an alternate world called the New Demon Kingdom, and is told that he is to be the new king of the demons.
Yuri's older brother thinks back to when Yuri was younger and the two brothers spent the day at an amusement park to get away from their feuding parents.
Yuri's older brother thinks back to when Yuri was younger and the two brothers spent the day at an amusement park to get away from their feuding parents.
A number of children are gathered for a celebration at Covenant Castle, including Hube and Nicola's son El, but things go crazy when El's magic powers are amplified by one of Anissina's devices!
A number of children are gathered for a celebration at Covenant Castle, including Hube and Nicola's son El, but things go crazy when El's magic powers are amplified by one of Anissina's devices!
Lady Ulrike falls ill, while at the same time, a girl that resembles her appears in town and demonstrates incredible magical powers, leaving Yuri, Wolfram, and Conrad to try and rein her in.
Lady Ulrike falls ill, while at the same time, a girl that resembles her appears in town and demonstrates incredible magical powers, leaving Yuri, Wolfram, and Conrad to try and rein her in.
Princess Elizabeth, the winner of the Great Demon Kingdom beauty pageant, is used by Stoffel to enact a plan to form a bond with Yuri, but she claims to already be engaged... to Wolfram?!
Princess Elizabeth, the winner of the Great Demon Kingdom beauty pageant, is used by Stoffel to enact a plan to form a bond with Yuri, but she claims to already be engaged... to Wolfram?!
Continuing the hunt for the final box, Yuri and the others hear of a box at the bottom of a lake and head there, where they meet Ulrike's predecessor and learn of the history of the land around them.
Continuing the hunt for the final box, Yuri and the others hear of a box at the bottom of a lake and head there, where they meet Ulrike's predecessor and learn of the history of the land around them.
Bandits threaten a small town and Gwendal finds himself joining Conrad's father, Lord Dunheely, in helping the townspeople. Can Gwendal set aside his prejudice against humans for the good of the people?
Bandits threaten a small town and Gwendal finds himself joining Conrad's father, Lord Dunheely, in helping the townspeople. Can Gwendal set aside his prejudice against humans for the good of the people?
Big Cimaron proposes a student exchange as a cover to strike back after their box is stolen, but the Great Demon Kingdom and their allies don't fall for it, leading Gwendal to plan his own covert mission.
Big Cimaron proposes a student exchange as a cover to strike back after their box is stolen, but the Great Demon Kingdom and their allies don't fall for it, leading Gwendal to plan his own covert mission.
Yuri is taken hostage by Adalbert, who demands to know if Yuri truly has Julia's soul, but he finds himself having to defend Yuri from Big Cimaron's soldiers as the island's volcano starts to rumble...
Yuri is taken hostage by Adalbert, who demands to know if Yuri truly has Julia's soul, but he finds himself having to defend Yuri from Big Cimaron's soldiers as the island's volcano starts to rumble...
As the volcano erupts around them, the soldiers flee, leaving the children behind, while Adalbert, overcome with emotion from Julia's fate, angrily duels Conrad.
As the volcano erupts around them, the soldiers flee, leaving the children behind, while Adalbert, overcome with emotion from Julia's fate, angrily duels Conrad.
Maxine returns and kidnaps Yuri in a bid to earn fortune and power, but quickly changes his plan and takes the maids hostage instead, but will he survive?
Maxine returns and kidnaps Yuri in a bid to earn fortune and power, but quickly changes his plan and takes the maids hostage instead, but will he survive?
Yuri finds himself transported back in time to the era of Celi's rule, where he comes face to face with Julia, as Conrad heads out on a dangerous mission to demonstrate his devotion to the Great Demon Kingdom.
Yuri finds himself transported back in time to the era of Celi's rule, where he comes face to face with Julia, as Conrad heads out on a dangerous mission to demonstrate his devotion to the Great Demon Kingdom.
Embarking on a tour of the nation, Ganter writes to Yuri, telling him the story of a town in the distant west and the lone woman who keeps the frightened people united.
Embarking on a tour of the nation, Ganter writes to Yuri, telling him the story of a town in the distant west and the lone woman who keeps the frightened people united.
When someone using the Holy Sword appears, everyone believes that Alford is responsible, but Yuri isn't quite so convinced. They embark on a village where bandit attacks have been occurring, seeking a man in a cloak.
When someone using the Holy Sword appears, everyone believes that Alford is responsible, but Yuri isn't quite so convinced. They embark on a village where bandit attacks have been occurring, seeking a man in a cloak.
Discovering the man using the sword is possessed, Alford explains how he lost his blade, leading Yuri to a showdown in which he may very well need Morgif's full power to stop the Holy Sword!
Discovering the man using the sword is possessed, Alford explains how he lost his blade, leading Yuri to a showdown in which he may very well need Morgif's full power to stop the Holy Sword!
When Conrad's arm and Gwendal's eye begin to experience pain, a feeling of impending darkness washes over them as faceless puppets kidnap Wolfram, with Yuri giving chase...
When Conrad's arm and Gwendal's eye begin to experience pain, a feeling of impending darkness washes over them as faceless puppets kidnap Wolfram, with Yuri giving chase...
Yuri joins the captured Wolfram and the pair are to be handed over to King Belar, but before this happens, their transport is intercepted by a magic user with incredible power that Yuri is no match for!
Yuri joins the captured Wolfram and the pair are to be handed over to King Belar, but before this happens, their transport is intercepted by a magic user with incredible power that Yuri is no match for!
Yuri heads for Big Cimaron, intent on convincing Belar to stop fighting. After battling through more puppets, Yuri discovers Belar is also being controlled and it's up to him to stop the mysterious puppet master!
Yuri heads for Big Cimaron, intent on convincing Belar to stop fighting. After battling through more puppets, Yuri discovers Belar is also being controlled and it's up to him to stop the mysterious puppet master!
After Ulrike reveals that the final box is located on Earth, Yuri and the others travel there, meeting Yuri's family, who have known all along about Yuri's role as Demon King!
After Ulrike reveals that the final box is located on Earth, Yuri and the others travel there, meeting Yuri's family, who have known all along about Yuri's role as Demon King!
Shori meets with Rodriguez, who requests that Shori persuade Conrad and the others to return to the Demon Kingdom, but when his attempts fail, he attacks Conrad directly!
Shori meets with Rodriguez, who requests that Shori persuade Conrad and the others to return to the Demon Kingdom, but when his attempts fail, he attacks Conrad directly!
The group travel to Switzerland to meet the Demon King of Earth, Bob. Once there, Shori tries again to convince Yuri to come home and abandon his throne.
The group travel to Switzerland to meet the Demon King of Earth, Bob. Once there, Shori tries again to convince Yuri to come home and abandon his throne.
With all four boxes gathered in one place, the animals of the Demon Kingdom get restless, and the Boneys are no exception, leading them to kidnap little El!
With all four boxes gathered in one place, the animals of the Demon Kingdom get restless, and the Boneys are no exception, leading them to kidnap little El!
After being flushed down a toilet, 15-year-old Yuuri Shibuya is transported to an alternate world called the New Demon Kingdom, and is told that he is to be the new king of the demons.