Isekai Maou to Shoukan Shoujo no Dorei Majutsu

How Not to Summon a Demon Lord

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Alternative Titles

Synonyms: The Otherworldly Demon King and the Summoner Girls' Slave Magic
Japanese: 異世界魔王と召喚少女の奴隷魔術
English: How Not to Summon a Demon Lord
German: How Not To Summon A Demon Lord
Spanish: How not to Summon a Demon Lord
French: How Not to Summon a Demon Lord
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Jul 5, 2018 to Sep 20, 2018
Premiered: Summer 2018
Broadcast: Thursdays at 21:30 (JST)
Licensors: Funimation
Studios: Ajia-do
Genres: ActionAction, FantasyFantasy, EcchiEcchi
Themes: HaremHarem, IsekaiIsekai
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 6.841 (scored by 427354427,354 users)
1 indicates a weighted score.
Ranked: #49372
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #277
Members: 729,074
Favorites: 2,517

Available At


Streaming Platforms

Ranked #4937Popularity #277Members 729,074
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Episodes: /12


When it comes to the fantasy MMORPG Cross Reverie, none can match the power of the Demon King Diablo. Possessing the game's rarest artifacts and an unrivaled player level, he overpowers all foolish enough to confront him. But despite his fearsome reputation, Diablo's true identity is Takuma Sakamoto, a shut-in gamer devoid of any social skills. Defeating hopeless challengers day by day, Takuma cares about nothing else but his virtual life—that is, until a summoning spell suddenly transports him to another world where he has Diablo's appearance!

In this new world resembling his favorite game, Takuma is greeted by the two girls who summoned him: Rem Galeu, a petite Pantherian adventurer, and Shera L. Greenwood, a busty Elf summoner. They perform an Enslavement Ritual in an attempt to subjugate him, but the spell backfires and causes them to become his slaves instead. With the situation now becoming more awkward than ever, Takuma decides to accompany the girls in finding a way to unbind their contract while learning to adapt to his new existence as the menacing Demon King.

[Written by MAL Rewrite]

Characters & Voice Actors



Opening Theme

Apple Music
Amazon Music
Youtube Music
"DeCIDE" by SUMMONERS 2+ (Yuu Serizawa, Azumi Waki, Yumi Hara, Rumi Ookubo, Emiri Katou)

Ending Theme

1: "Saiaku na hi demo Anata ga Suki" by Yuu Serizawa (eps 1-11)
2: "DeCIDE" by SUMMONERS 2+ (Yuu Serizawa, Azumi Waki, Yumi Hara, Rumi Ookubo, Emiri Katou) (eps 12)

Episode Videos


Apr 25, 2024
Everything comes back to individual tastes, so before you watch anime, please note that you like anime with MC OP and Harem.

In my opinion, this anime is not much different from other anime I have watched, especially Isekai themed anime, where the MC enters another world, be it a game or something similar.
However, there are several points that I think this anime is worth watching.

Firstly, this anime has a quite interesting storyline, it's not too boring to watch, maybe I didn't really like the ending.

Second, this anime has good character designs, everything is detailed and has effects that are considered perfect.

These three anime have good ...
Dec 14, 2021
Mixed Feelings
If I had to describe this anime in 3 words, these would be: Classic, mediocre, entertaining.

The story is simply mediocre, it has some slight touches of originality such as the main development attempt and his "role", but nothing more. After that the story is completely predictable and not original at all.

Everything about the art, sound and concepts is quite "decent" the style of cute and sexually attractive animations, so it does the job well. I wouldn't place it as great animation or art anime, it has just what you would expect.

The "ecchi" is good. In fact I would categorize as "ecchi" the main genre of ...
Apr 18, 2022
Isekai Maou to Shoukan Shoujo no Dorei Majutsu it’s just common ecchi/harem anime. The main character, Diablo, is a guy who teleported to the world from his favorite game. In real life he’s no one but in this world, he’s Demon King. It’s common anime, so what’s wrong with it? Honestly, for me, a lot of things are just bad.

But lets start with the good part.

From the visual side, it’s not bad anime, it’s just nothing special. Fight scenes are not chaotic, “special spells” don’t look like they were made in Paint. But in ecchi bazoongas are the most important thing. Yeah, bazoongas are ...

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