As of July 2026, How Not to Summon a Demon Lord Season 1 aired in 2018 with 12 episodes — streaming now on Crunchyroll. Full episode guide and where to watch below.
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How Not to Summon a Demon Lord Season 1

2018 12 Episodes Action & Adventure · Comedy ⭐ 8/10

Right now you can watch How Not to Summon a Demon Lord Season 1 on and — and it is funnier than its reputation suggests. The show says what it needs to say in a single season, no filler. 354 people have weighed in on TMDB, and the verdict leans heavily positive. Masaaki Mizunaka leads a cast with real comic timing. Put it on tonight and see for yourself.

How Not to Summon a Demon Lord Season 1 is not trying to be everything to everyone, and that focus is exactly what makes it work. Sharp writing and a well-matched ensemble are what separate How Not to Summon a Demon Lord Season 1 from the crowd. Sakamoto Takuma was so strong in the MMORPG Cross Reverie that his fellow players came to call him the "demon lord." One day, he gets summoned to another world in his avatar form, and meets two girls who both insist that they're the one who summoned him. They cast a spell used to enslave summoned beasts on him, but that activates his unique ability, Magic Reflect, and the girls end up being the ones put under the spell! And thus begins the otherworldly adventure of a demon lord (pretend) who blazes his own trail through overwhelming power. Masaaki Mizunaka and Yu Serizawa lead a cast that brings real weight to the material. It was aired in 2018. How Not to Summon a Demon Lord Season 1 earns its laughs from character rather than situation, which is why it does not wear thin the way pure farce tends to. It rarely drops the ball, and when it does, it recovers fast.

For viewers who want something light without wanting something stupid, How Not to Summon a Demon Lord Season 1 respects your intelligence. It stands on its own even without an obvious comparison point. Short enough to finish in a weekend, substantial enough to feel satisfying. Masaaki Mizunaka's comic timing carries it through its weaker moments. The kind of comedy you recommend to someone who claims they do not watch much.

📡 Where to Watch How Not to Summon a Demon Lord Season 1

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🎬 How Not to Summon a Demon Lord Season 1 — Episode Guide

E1
The Demon Lord Act
2018-07-05
Takuma Sakamoto was a shut-in gamer who achieved renown as the Demon Lord in Cross Reverie, a MMORPG, for his overwhelming gear and skill.
E2
Strongest Newcomer
2018-07-12
After awaking to hands filled with breasts, Diablo follows Shera and Rem to register as new members of the Adventurer’s Guild. While Shera is identified as a level 30 Summoner by the guild, Diablo’s level proves too high for them to measure.
E3
Fallen Assault
2018-07-19
The Warrior Emile, defender and ally of all women, challenges Diablo to a fight.
E4
Point-Blank War Dance
2018-07-26
Rem, Celestine, and even Emile struggle in their battle against Gregore’s sudden attack. Meanwhile, Diablo and Edelgard confront each other on the Bridge of Ulug.
E5
Imperial Knight
2018-08-02
The Kingdom of Greenwood demands that Faltra City hand over Princess Shera. If they refuse, it will lead to war, so Diablo meets with Galford, the Lord of Faltra City, and accepts a quest to prevent war from breaking out.
E6
Slave Market
2018-08-09
While Greenwood’s demands remain unmet, Diablo and the girls visit a slave market to see if they can learn the magical secret of the Enslavement Collars.
E7
Change of Heart
2018-08-16
The following day after Prince Keera’s visit, Shera suddenly bids farewell to Diablo while they’re preparing potions. Unable to stop her from leaving, Diablo holes up in the inn, consumed with regret. Rem is unsettled to see him so negative, too.
E8
Hero’s Charge
2018-08-23
Diablo squares off with Prince Keera’s Summon, the Force Hydra, a monster he has never faced before.
E9
Holy Knight Tale
2018-08-30
Alicia returns to the Imperial Capital to give her report on the incident between Faltra and the Kingdom of Greenwood. There she encounters the Paladin, Saddler.
E10
The Demon Lord’s Resurrection
2018-09-06
The night of the Demon Lord’s resurrection arrives at long last. Rem finally reveals to Shera and Alicia that the Demon Lord Krebskulm’s soul is sealed within her. Together, Diablo’s party heads for Starfall Tower, where Edelgard awaits.
E11
The Young Girl Awakens
2018-09-13
Diablo’s party returns to Faltra with the newly resurrected Klem. On their way back from visiting Celestine, Rem and Klem suddenly get separated from Diablo and Shera, with Alicia having led them both astray.
E12
Battle for Legitimacy
2018-09-20
The Demon Lord Krebskulm has awakened due to Alicia’s betrayal. Diablo stands alone against Klem, her mind consumed by hatred. Shera races to Rem’s side. An army of Fallen led by Edelgard marches on Faltra, and the curtain rises on their final battle.

🎭 Cast of How Not to Summon a Demon Lord Season 1

Masaaki Mizunaka
Masaaki Mizunaka
Sakamoto Takuma (voice)
Yu Serizawa
Yu Serizawa
Shera L. Greenwood (voice)
Azumi Waki
Azumi Waki
Rem Galeu (voice)
Yumi Hara
Yumi Hara
Alicia Crystella (voice)
Rumi Okubo
Rumi Okubo
Sylvie (voice)
Emiri Kato
Emiri Kato
Edelgard (voice)
Atsumi Tanezaki
Atsumi Tanezaki
Klem (voice)
Sayaka Senbongi
Sayaka Senbongi
Celestine Baudelaire (voice)
Ryotaro Okiayu
Ryotaro Okiayu
Emile Bichelberger (voice)
Akira Ishida
Akira Ishida
Keera L Greenwood (voice)

📋 All Seasons of How Not to Summon a Demon Lord

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