Fourteen-year-old Iruma Suzuki has just been abandoned and sold to a demon by his irresponsible parents! Surprisingly, the next thing he knows he's living with the demon who has adopted him as his new grandson and has been transferred into a school in the Netherworld where his new demon grandfather works as the principal. Thus begins the cowardly Iruma-kun's extraordinary school life among the otherworldly as he faces his true self, takes on challenges, and rises to become someone great.
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| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Iruma-kun from Demon School | 2019-10-05 | 30 min |
| Season 1 | Episode 2 | Familiars Summoned | 2019-10-12 | 30 min |
| Season 1 | Episode 3 | Iruma and Clara, Demon Friends | 2019-10-19 | 30 min |
| Season 1 | Episode 4 | The Misfit Class | 2019-10-26 | 30 min |
| Season 1 | Episode 5 | The One Who Wants to Be Demon King | 2019-11-02 | 30 min |
| Season 1 | Episode 6 | Ameri's Theory | 2019-11-09 | 30 min |
| Season 1 | Episode 7 | First Love Memories | 2019-11-16 | 30 min |
| Season 1 | Episode 8 | Head Over Heels for Clara | 2019-11-23 | 30 min |
| Season 1 | Episode 9 | Iruma's Decision and Hard Work | 2019-11-30 | 30 min |
| Season 1 | Episode 10 | Fierce Battle, Execution Cannonball | 2019-12-07 | 30 min |
| Season 1 | Episode 11 | Together With Familiars / The Battler's Challenge | 2019-12-14 | 30 min |
| Season 1 | Episode 12 | The Rookie Hunt | 2019-12-21 | 30 min |
| Season 1 | Episode 13 | The Magical Apparatus Battler / The Thirteen's Dinner | 2019-12-28 | 30 min |
| Season 1 | Episode 14 | The Battler's Presentation | 2020-01-04 | 30 min |
| Season 1 | Episode 15 | Kiriwo's Secret Room | 2020-01-11 | 30 min |
| Season 1 | Episode 16 | Party Eve | 2020-01-18 | 30 min |
| Season 1 | Episode 17 | Run Iruma, to Kiriwo! | 2020-01-25 | 30 min |
| Season 1 | Episode 18 | What I Want More Than Anything | 2020-02-01 | 30 min |
| Season 1 | Episode 19 | I Want to Pick Everything Up / Family Time | 2020-02-08 | 30 min |
| Season 1 | Episode 20 | Glorious Award / Treatment of Humans | 2020-02-15 | 30 min |
| Season 1 | Episode 21 | Dem-dol Kuromu-chan! | 2020-02-22 | 30 min |
| Season 1 | Episode 22 | Sparkling Shock | 2020-02-29 | 30 min |
| Season 1 | Episode 23 | You Fit Right In Now, Iruma-kun | 2020-03-07 | 30 min |
| Season 2 | Episode 1 | The Secret of the Ring | 2021-04-17 | 30 min |
| Season 2 | Episode 2 | Amelie's Decision | 2021-04-24 | 30 min |
| Season 2 | Episode 3 | A Lovely Demoness | 2021-05-01 | 30 min |
| Season 2 | Episode 4 | The Student Council President's Gaze | 2021-05-08 | 30 min |
| Season 2 | Episode 5 | Invite Your Friends | 2021-05-15 | 30 min |
| Season 2 | Episode 6 | Royal One | 2021-05-22 | 30 min |
| Season 2 | Episode 7 | The Teachers at Babyls | 2021-05-29 | 30 min |
| Season 2 | Episode 8 | The Miracle of Some Fools | 2021-06-05 | 30 min |
| Season 2 | Episode 9 | Studying in the Netherworld | 2021-06-12 | 30 min |
| Season 2 | Episode 10 | Balam's Lesson | 2021-06-19 | 30 min |
| Season 2 | Episode 11 | The End-of-Terminus / Girl Talk | 2021-06-26 | 30 min |
| Season 2 | Episode 12 | The Home Visit of Kalego Teacher | 2021-07-03 | 30 min |
| Season 2 | Episode 13 | Walter Park | 2021-07-10 | 30 min |
| Season 2 | Episode 14 | Everyone's Playmate | 2021-07-17 | 30 min |
| Season 2 | Episode 15 | Demon Beast Raid | 2021-07-24 | 30 min |
| Season 2 | Episode 16 | What is the Name of this Feeling | 2021-07-31 | 30 min |
| Season 2 | Episode 17 | The Ultimate Halberd | 2021-08-07 | 30 min |
| Season 2 | Episode 18 | My Desire | 2021-08-14 | 30 min |
| Season 2 | Episode 19 | Clara's House | 2021-08-21 | 30 min |
| Season 2 | Episode 20 | Dream Date | 2021-09-04 | 30 min |
| Season 2 | Episode 21 | The One Who Rules Over the Netherworld | 2021-09-11 | 30 min |
| Season 3 | Episode 1 | The Misfit Class's New Term | 2022-10-08 | 30 min |
| Season 3 | Episode 2 | Master Bachiko | 2022-10-15 | 30 min |
| Season 3 | Episode 3 | Iruma's True Feelings | 2022-10-22 | 30 min |
| Season 3 | Episode 4 | The Signal That the Harvest Festival Has Begun | 2022-10-29 | 30 min |
| Season 3 | Episode 5 | Cunning Demons | 2022-11-05 | 30 min |
| Season 3 | Episode 6 | Devilishly Pure | 2022-11-12 | 30 min |
| Season 3 | Episode 7 | Clara's Toy Box / A Night Filled with Screams | 2022-11-19 | 30 min |
| Season 3 | Episode 8 | Can We Make 100 Friends? / The Students I'm Proud Of | 2022-11-26 | 30 min |
| Season 3 | Episode 9 | The Dorodoro Brothers'Provocation | 2022-12-03 | 30 min |
| Season 3 | Episode 10 | The Iruma I Know | 2022-12-10 | 30 min |
| Season 3 | Episode 11 | Toto the Genie | 2022-12-17 | 30 min |
| Season 3 | Episode 12 | Wish Upon Your Bow | 2022-12-24 | 30 min |
| Season 3 | Episode 13 | My Very Own Magic | 2023-01-07 | 30 min |
| Season 3 | Episode 14 | Lead's Distress | 2023-01-14 | 30 min |
| Season 3 | Episode 15 | The True Worth of the Archer | 2023-01-21 | 30 min |
| Season 3 | Episode 16 | The End of the Harvest Festival | 2023-01-28 | 30 min |
| Season 3 | Episode 17 | Legend Leaf | 2023-02-04 | 30 min |
| Season 3 | Episode 18 | Welcome Back | 2023-02-11 | 30 min |
| Season 3 | Episode 19 | The Instructors' Banquet | 2023-02-18 | 30 min |
| Season 3 | Episode 20 | Bad Company / Heartfelt Cooking Class | 2023-02-25 | 30 min |
| Season 3 | Episode 21 | Words for My Friends | 2023-03-04 | 30 min |
| Sound | Sekai Yamamoto | Theme Song Performance |
| Art | Yasuyuki Noda | Concept Artist |
| Sound | Yayoi Sekimukai | Original Music Composer |
| Art | Kaori Takahata | Concept Artist |
| Art | Jun Fuji | Concept Artist |
| Art | Akira Kikuchi | Concept Artist |
| Editing | Emi Onodera | Editor |
| Visual Effects | Yumiko Hara | Character Designer |
| Production | Mirai Miyamoto | Production Supervisor |
| Visual Effects | Tomoe Takaya | Color Designer |
| Writing | Osamu Nishi | Comic Book |
| Production | Saori Kohara | Producer |
| Sound | Nobuto Kojima | Sound Recordist |
| Sound | Noriko Izumo | Sound Effects |
| Production | Isao Yoshikuni | Production Supervisor |
| Sound | Hozumi Goda | Sound Director |
| Camera | Hiroyuki Chiba | Director of Photography |
| Directing | Makoto Moriwaki | Series Director |
| Sound | Akimitsu Homma | Original Music Composer |
| Art | Hitomi Yoshida | Art Direction |
| Writing | Kazuyuki Fudeyasu | Series Composition |
