Welcome to Demon School! Iruma-kun Season 1: A Human's Survival in the Netherworld
What if your parents were so lazy and irresponsible that they literally sold your soul to a demon just for some quick cash? For 14-year-old Iruma Suzuki, this isn't a dark tragedy—it’s the start of the best thing that ever happened to him.
Welcome to Demon School! Iruma-kun (Mairimashita! Iruma-kun) is a vibrant, chaotic, and heartwarming subversion of the Shonen and Isekai genres. Unlike the brooding protagonists of other series, Iruma is a professional "yes-man" whose only superpower is his god-tier ability to dodge danger. In this article, we explore Iruma’s first year at Babylys Demon School, his rise from a terrified snack to a demonic icon, and the "Abnormal Class" that changed his world.
The Story: From Soul-Sold to School Idol
The Grandchild Contract
Iruma Suzuki has spent his entire life working dangerous jobs to support his terrible parents. One day, he is snatched away by a terrifying demon named Sullivan. However, instead of eating him, Sullivan falls to his knees and begs Iruma to become his grandchild.
Sullivan, one of the three candidates for the next Demon King, is incredibly powerful but incredibly lonely. Iruma, unable to say "no" to any request, agrees. He is whisked away to the Netherworld, given a magic ring, and enrolled in Babylys Demon School. The only catch? If the other students find out he’s human, they’ll eat him.
The First Day: Crossing the Line
On his first day, Iruma is forced to give the student address. Sullivan, being a doting (and chaotic) grandfather, gives Iruma a speech that turns out to be a forbidden chanting spell. By reciting it perfectly, Iruma inadvertently shocks the entire school.
This leads to a duel with the top freshman, Asmodeus Alice. Using his "Overwhelming Crisis Evasion" skill—perfected from years of dodging his parents' mishaps—Iruma avoids every attack. In a freak accident, he ends up "German Suplexing" Asmodeus. Because demons respect strength above all else, Asmodeus immediately pledges his eternal loyalty to Iruma, becoming his first friend and "soul brother."
The Abnormal Class and the Ring of Gluttony
During the rank-determination ceremony, Iruma pulls his hand out of the Rank Owl’s pouch only to find a strange, gold ring stuck to his finger: the Ring of Gluttony. This ring stores magic and, if not controlled, can suck the mana out of everyone nearby.
Because of his strange ranking and the chanting incident, Iruma is placed in the Abnormal Class (the Misfit Class). This is a collection of the weirdest, most troublesome students in school. Here, he meets Valac Clara, a chaotic girl with pockets that can produce anything she’s seen. Together with Asmodeus, they form the series' core trio.
The Cannonball Execution and Ranking Up
Demons live in a strict hierarchy based on "Ranks" (from 1-Alef to 10-Yodh). To raise his rank and avoid suspicion, Iruma participates in Cannonball Execution (Demon Dodgeball).
While everyone else uses lethal magic, Iruma uses his dodging skills. In the final moments, he catches a magical blast with his bare hands (thanks to the ring) and wins. His rank rises to 2-Bet, and he starts to realize that for the first time in his life, he’s actually having fun.
The Battler Party and the Kirio Plot
The midpoint of the season introduces "Battlers" (school clubs). Iruma joins the Magical Apparatus Battler, led by a frail, upperclassman named Ami Kirio. Kirio seems kind, but he hides a dark secret: he is a "Return to Origins" demon who finds pleasure in the suffering of others.
During the Battler Party (the school festival), Kirio plans to blow up the entire school using a massive magical firework. Iruma, sensing the danger, uses the stored magic in his Ring of Gluttony—amplified by his own human "greed" for a peaceful school life—to launch the explosion into the sky, turning a potential massacre into a beautiful light show. Kirio is arrested, but his existence hints at a darker political movement within the Netherworld.
Character Explanation: The Misfit Class
Iruma Suzuki – Protagonist: The ultimate pacifist. His "Crisis Evasion" makes him untouchable. He possesses the "Ring of Gluttony," which allows him to use magic despite being human.
Asmodeus Alice – Best Friend / Rival: A fire-magic prodigy. He is obsessively loyal to Iruma and views him as the future Demon King.
Valac Clara – Best Friend / Chaos: Energetic and unpredictable. Her bloodline ability "Toy Box" allows her to pull items from her pockets. She loves Iruma purely for the fun they have.
Ameri Azazel – Student Council President: A powerful, tall demon who suspects Iruma is human. However, she becomes addicted to him reading her "forbidden texts" (shoujo manga).
Naberius Kalego – Homeroom Teacher: A stern, grumpy teacher who accidentally became Iruma’s "Familiar." In his familiar form, he is a tiny, fluffy, angry bird.
Sullivan – Grandfather / Principal: One of the most powerful demons alive. He is childish and doting towards Iruma but hides immense political power.
Key Highlights: The Heart of the Netherworld
The Familiar Summoning
In a hilarious twist of fate, Iruma uses a summoning scroll meant for demons. Because he is human, the spell backfires and summons his teacher, Kalego-sensei, as his familiar. This creates a permanent, hilarious dynamic where the scariest teacher in school is forced to obey the most polite student.
Reading with Ameri
Ameri Azazel’s obsession with "First Love Memories" (a human manga) is a highlight of the season. Because demons can't read human text, Iruma translates for her. These quiet moments develop their relationship and show that Iruma’s "humanity" is his greatest charm.
The Demon King Prophecy
The season subtly introduces a prophecy: "He shall make all his subjects his own, he shall form blood contracts and heal all beasts... He shall descend from a foreign realm and wear the golden ring of Solomon on his right hand." Every step Iruma takes, though accidental, perfectly aligns with the path to the throne.
FAQ: Season 1 Lore & Mysteries
1. Why can Iruma use magic?
Iruma himself has no mana. He uses the Ring of Gluttony, which Sullivan "feeds" with his own immense magic. Iruma simply provides the imagination and the "orders" for the ring to execute spells.
2. Do the other students know he's human?
Only Sullivan, his assistant Opera, and later Ameri (mostly) know. The other students assume Iruma is a "weird" demon with unique, high-level evasion abilities and a strange familiar.
3. What is the "Evil Cycle"?
Demons occasionally enter a period of increased stress and malevolence called an Evil Cycle. While we only see hints of it in Season 1, it becomes a major plot point in later seasons when Iruma undergoes a personality shift.
4. Who was the previous Demon King?
The Demon King Derkyila disappeared years ago. Since his disappearance, the Netherworld has been stable but lacking a central "pillar," which is why Sullivan and others are looking for a successor.
5. Why are Iruma’s parents so bad?
They are used as a comedic trope for "Extreme Negligence." Their selfishness is the catalyst that allows Iruma to value his new life in the Netherworld far more than his old life on Earth.
Conclusion: A Human King in the Making?
Season 1 of Welcome to Demon School! Iruma-kun is a masterclass in feel-good storytelling. It takes the "fish out of water" trope and adds layers of genuine friendship, school-life comedy, and a creeping mystery regarding Iruma’s destiny.
Iruma started the season just trying to survive the day without being eaten. He ended it with a loyal circle of friends, a loving (if eccentric) family, and a seat in the most prestigious class in Babylys. But the Netherworld is changing. With the "Return to Origins" group gaining ground and Iruma’s rank continuing to rise, his "human" secret will become harder to keep.
The school year is just beginning. With the "Harvest Festival" and the "Music Festival" on the horizon, Iruma Suzuki’s journey from "snack" to "sovereign" is just getting started. Welcome to the Demon School—it’s much nicer than you think!
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