, also known as or for short, is a Japanese manga series by Osamu Nishi about a teenager who is sold by his parents to a demon who adopts him as his grandson and enrolls him in a school for demons. It has been serialized in Akita Shoten's manga magazine Weekly Shōnen Champion since March 2017, with its chapters collected in 51 volumes as of October 2026.
An anime television series adaptation, produced by BN Pictures, aired on NHK Educational TV between October 2019 and March 2020, followed by a second season aired from April to September 2021, and a third season aired from October 2022 to March 2023. A fourth season aired from April to September 2026. A new anime film has been announced.
By March 2026, the manga and its spin-offs had over 20 million copies in circulation.
Plot The story follows Iruma Suzuki, a 14-year-old human boy who is sold to a demon by his lazy, selfish and neglectful parents. The demon, known as Sullivan, takes Iruma to the Demon World and officially adopts him as his grandson. He enrolls Iruma in the Babyls School for Demons where he is the headmaster and where Iruma quickly befriends the demons Alice Asmodeus and Clara Valac. However, Sullivan tells Iruma to never reveal that he is human since he will be eaten if anyone finds out.
Characters Main characters
Iruma is a 14-year-old human boy who was sold by his parents to the Demon Lord Sullivan, who adopts him as his grandson. Iruma's parents neglected him (in ridiculously extreme ways), so he was unable to attend normal school regularly in the human world. From a young age, he experienced a variety of situations and had many jobs in order to support himself. These odd experiences helped him develop great adaptability, survival skills and agility. Iruma is also very kind which makes him gullible to requests as he genuinely helps people even at his own inconvenience. He attends the demon school by concealing his true identity as a human. Despite his earnest efforts to keep a low profile, he frequently stands out among his peers partly because of misunderstandings and also from Sullivan's eccentricity. Iruma later learns to come to terms with his popularity; he becomes friends with Alice and Clara and they soon form an unlikely trio. He is highly admired by his fellow classmates and acquaintances, initially due to the misunderstandings surrounding him, but later due to his own merits and his never-give-up attitude. During the Demon Rank placement exams, his rank was immeasurable because the ranking owl gave him the Ring of Gluttony from a Demonic Prophecy instead of a rank badge, so he was placed in the lowest rank: Aleph (Rank 1). Also, Iruma accidentally made his homeroom teacher, Kalego, his familiar. After some initial deliberation, Iruma resolves to work hard to get promoted in rank and to make his new family proud and become strong enough to protect those he really cares for. He is now currently ranked 5.5, between ranks He (Rank 5) and Vau (Rank 6), the second highest among the students of Babyls, due to irregularites in his most recent rank exam.Manga chapter 373
Iruma's best friend and loyal companion after he lost a battle to Iruma (who dodged all of his attacks) on his first day at Babyls. Primarily referred to by his family name, or "Azu" for short. His rank and power exceed those of most freshmen, and he has the ability to wield fire. He was the valedictorian of the freshman class, with the highest grades on the entrance exam. He was placed in the Misfit Class due to his duel with Iruma causing a massive ruckus in the entire school. At first, he begrudgingly played with Clara upon Iruma's request, but later also becomes her best friend. He is generally very calm, but when Iruma is involved, he becomes more emotional, even fighting with Clara so he can get Iruma's attention. His familiar is a white Gorgon snake who also wields fire. He is now currently ranked as He (Rank 5). Both his original name and his localized name make reference to the demoniac figure known as Asmodeus.
A fox-eared demon who is the president of the student council of the Babyls School for Demons. Although she is dignified and is highly respected by the student population, she is also a girl who is secretly a fan of the human world, especially a romance manga named "First Love Memories". Ameri was the first demon to suspect that Iruma is a human despite the common belief in Demon World that humans are mythical. She later confirms her suspicions and becomes friends with Iruma and develops strong feelings for him, although Iruma is not aware that she knows he is a human. Later it is revealed that her mother was a human girl. Her rank is Vau (Rank 6), the highest among the students of Babyls. Both her original and her localized name makes reference to the biblical figure Azazel.
A highly odd (even by demon standards) and energetic Valac girl who constantly wants to play. Her bloodline ability allows her to pull out anything she has seen from her pockets, and she had to bribe other demons with snacks to play with her until she met Iruma. Iruma told Clara he doesn't need anything since he truly enjoyed playing with her, which boosts Clara's confidence and she soon becomes best friends with Iruma and Alice. She later also develops feelings for Iruma and vows to make Iruma enchanted by her. She was placed in the Misfit Class alongside Iruma and Alice due to her various comical antics causing trouble for the entire school. Her familiar is a rare indescribable creature called Falfal and she is currently ranked as Daleth (Rank 4). Her localized name makes reference to the goetic demon Valac.
Iruma's homeroom teacher. Not knowing Iruma was human when teaching students how to summon familiars, Kalego was summoned by him by accident due to his mark being on the summon sheet. His familiar form is that of a small owl-like creature with bat wings and small black horns. His rank is Cheth (Rank 8), the highest of any demon teacher at the Babyls School for Demons, with the exception of the headmaster, Sullivan, whose rank is Tet (Rank 9), and his friend, Balam Shichirou, who holds the same rank. Seemingly aloof and skeptic, in reality, he deeply cares for his students and their well-being, though he tends to twist situations so he can punish the Misfit Class for amusement. Both his original and his localized name makes reference to the goetic demon Naberius, further reinforced by his bloodline ability which summons a three-headed hound.
The headmaster of the Babyls School for Demons and a demon who appears as an older man. He is one of the three demons in the Demon World who ranks as a Tet (Rank 9) and is one of the most powerful and influential demons in society. Thus, he is a possible candidate for the new Demon King since the disappearance of the last Demon King. Sullivan is also the demon that buys and subsequently adopts Iruma as his grandson. He did this so he could fill the void he felt every time he went to a meeting with his fellow Tet ranking friends, who said outstanding things about their own grandchildren. Sullivan is also responsible for granting Iruma the ability to read and understand the demon language through magic. He adores his new grandson and showers him with gifts and attention. In an effort to help Iruma blend in, he placed him along with Alice and Clara in the Abnormal Class; under the belief that strange students would camouflage him. Before the Demon King's disappearance, Sullivan was his attendant, affectionally nicknamed "Sacchan" by him.
Lord Sullivan's assistant, who appears as an androgynous and gender neutral cat-eared demon and also works as a secretary of sorts. Opera lives in the same house as Sullivan and Iruma, and manages the laundry, cooking, timetabling and transport for the two of them. They have a master-servant relationship, with Sullivan relying heavily on Opera's abilities and advice to keep him on track and away from distractions. Opera is one of the few demons that knows Iruma's true identity. Opera, for some reason, has little to no expression of emotions on their face but rather it shows on Opera's ears. Opera's rank is currently unknown, but they were Kalego's senior during their tenure at Babyls as students and is the only person who Kalego genuinely seems to fear.
Misfit Class Demons The Misfit Class (問題児アブノーマルクラス Abunōmaru Kurasu?, lit. Abnormal Class) is a special class of first-year troublemakers created by Sullivan to hide Iruma amongst the demons due to his sudden popularity in his first day, hoping that their bigger notoriety at the time would mask Iruma's own.
Most of them were initially looked down on, being considered "freaks" and occupying a shabby classroom near the school's garbage disposal center. Their various exploits, however, such as acquiring the Royal One (the Demon King's classroom back in his school days), saving an amusement park from evil demon beasts, harvesting the fabled Legend Leaf during the Harvest Festival, and winning the Music Festival with a perfect score and a personal commendation from the Demon King's former musician, have changed their reputation to "awesome freaks". They have also been unofficially called "The Thirteen Crowns of Babyls" by the student body.
He is the second son of the prestigious Sabnock family, with his bloodline magic being "Weapon Creation". He can create a weapon from anything he bites and wears a necklace of different materials around his neck. He has an intimidating appearance being roughly 8 ft. tall and very well-built, making himself the physically strongest. He comes off as ambitious and quite open with his desires. His goal is to become the next Demon King purely because it is the highest rank one can achieve in the Demon World. During the entrance ceremony, he attacked a teacher believing it would be the quickest way to gain a higher rank, but it was really the quickest way to being in the Misfit Class. He gains respect for Iruma after the Demon Rank placement exams and views him as his rival, although power-wise he clashes with Alice the most. His familiar is a Kelpie and his rank is Daleth (Rank 4).Manga vol 16 chapter 139 Both his original and his localized name make reference to the goetic demon Sabnock. He is related to Baal, the main antagonist of the series.
A humanoid female demon, who is seemingly the most normal student in the Misfit Class. Although she exhibits a shy and reserved personality in school, she secretly lives a double life as the evi-dol Kuromu, exhibiting a confident and hot-headed personality that made her the most famous evi-dol in the Netherworld. As a student, she wears special enchanted glasses that prevent the other students from recognizing her evi-dol identity. She joined the Misfit Class due to her work schedule working well with the Class' abnormal school schedule. Her bloodline magic, "Ice Facade", allows her to create ice from her body, though she would overheat from overuse, and if combined with emotional instability, can cause a fever that can only be cured by another family member. Her rank is Daleth (Rank 4) and her familiars are Snow Fox King and Blizzard Wolf, the strongest beasts she tamed in the Harvest Festival. Her localized name makes reference to the goetic demon Crocell.