How Many Episodes Are In How To Not Summon A Demon Lord Mature Anime?

Good news — 'How Not to Summon a Demon Lord' does have a little extra beyond the TV run. I picked up the limited Blu-ray set a while back and it included a short OVA episode that wasn't part of the 12-episode broadcast. It's basically a tossed-in bonus: a light, funny side-story that leans into the series' slice-of-life and fanservice beats rather than advancing the main plot. If you loved the dynamic between the main cast in the show, the OVA gives a few extra moments of that chemistry — comfy, silly, and very much for existing fans. If you don't own the physical discs, sometimes these OVAs turn up on streaming platforms as extras or get included in later home-video releases. I found it a nice little dessert after finishing the main cour; it doesn't change the story but it made me smile, like an extra scene after the credits.

The show that hooked me with awkward charm and over-the-top isekai antics first popped up in the summer season of 2018. 'How NOT to Summon a Demon Lord' premiered its initial TV run on July 5, 2018, adapting the light novel series by Yukiya Murasaki (with art by 029). That first cour introduced Diablo, Rem, and Shera and rode the wave of late-2010s isekai popularity, so it’s easy to remember when it hit screens — right in that July batch of new shows. Fans who stuck around got a follow-up: the second season, billed as 'How NOT to Summon a Demon Lord Ω', arrived during the spring 2021 season and began airing in early April 2021. Seeing the cast return after a gap felt like picking up a comic mid-arc; the tone stayed familiar but with a bit more polish in production. All in all, summer 2018 for the original premiere and April 2021 for the sequel — I still enjoy rewatching the awkward comedy beats between the action scenes.

You can usually find 'How NOT to Summon a Demon Lord' on the usual legal streaming hubs, and I personally check Crunchyroll first because they tend to host a ton of the subbed episodes. I’ve seen both seasons—the original and 'How NOT to Summon a Demon Lord Ω'—pop up there, and Crunchyroll often has simulcasts, clean subtitles, and sometimes extras like episode guides. Funimation historically handled a lot of the English-dubbed releases, so if you prefer dubs, scope out Funimation’s catalog or the merged Crunchyroll library where some dubbed episodes live now. If streaming is flaky where you are, I also look at Hulu and occasionally Netflix — availability bounces around by region — and you can often buy episodes or full seasons on platforms like Amazon Prime Video or iTunes. Don’t forget official Blu-ray releases if you want better quality and bonus content; they’re a nice collector’s route. Personally, I love rewatching the comedic beats and the cringey-ecchi moments with proper subtitles, so I stick to legal sources to keep the quality high and support the creators.

I got sucked into the madness of 'How Not to Summon a Demon Lord' pretty hard, so here's the clean viewing order I use when I want to rewatch everything without scratching my head. Start with season 1 — watch episodes 1 through 12 in broadcast order. That introduces the world, the main cast, and the initial comedic-but-awkward setups that define the show. After the TV run, there are a couple of Blu‑ray/DVD OVAs and short extras that expand on side scenes and gag moments; I usually slot those in right after season 1 so the characters’ smaller, silly beats don’t feel out of place later. Once you’ve finished those, move on to the follow‑up season, which is released under the title 'How Not to Summon a Demon Lord Ω'. Watch those episodes in their release order as well. If you’re curious about deeper plot details, the light novel and manga continue beyond the anime and add context to later arcs. Personally, watching things in that sequence keeps the pacing intact and the jokes landing for me.

I get a nostalgic buzz whenever someone brings up 'How Not to Summon a Demon Lord' — that show wrecked my chill nights for a while. The lead, Diablo (the persona of Takuma Sakamoto), is voiced in Japanese by Yūichi Nakamura. He gives Diablo that deadpan, gravelly swagger that makes the whole “overpowered loner with social anxiety” shtick land just right. If you're into seiyuu, you'll spot his signature cadence — it’s the kind of performance that balances menace with awkwardness and keeps Diablo oddly sympathetic. For the English dub, Ben Diskin handles Diablo’s voice. Diskin leans harder into the comedic timing and the persona’s exaggerated confidence, which plays nicely against the more flustered, shy moments of Takuma. Both versions change the flavor of scenes in fun ways, and I find myself rewatching certain bits in Japanese and English just to catch the different beats. It’s cool how much voice casting shapes the tone of 'How Not to Summon a Demon Lord' — I keep coming back for the performances as much as the spectacle.

I love digging into release differences for shows like 'How Not to Summon a Demon Lord'. On broadcast TV the series often had obvious censorship — zooms, light flares, and pixelation over ecchi bits during the original airings. That was pretty standard for late-night anime with risqué content. However, the Japanese Blu-ray and DVD releases are typically uncensored, restoring the original artwork and removing the broadcast blurs and bars. If you want the cleanest, intended presentation, the physical releases are the way to go. Streaming services sometimes carry the broadcast (censored) master at first, but some platforms later offer an 'uncut' or Blu-ray sourced version — availability varies by region and licensing. I always check retailer listings for wording like 'uncensored' or look at screenshots in product pages and community comparisons. For me, owning the Blu-rays not only removes the censorship but also usually gives better video quality and extras, so it's worth the purchase if you care about seeing the show as it was meant to be shown.

If you're hunting down where to stream 'How Not to Summon a Demon Lord', I can walk you through the usual suspects and a few purchase options I use when regional locks mess things up. Crunchyroll has been the go-to for many fans for both seasons — it carried subs consistently, and after the consolidation of libraries it often holds the streaming rights. Funimation originally streamed and produced the English dub, so if you prefer a dubbed watch you might still find Funimation listings or find those episodes migrated into Crunchyroll's catalog. In the US, Hulu has historically carried the show through a partnership with Funimation, so it's worth checking there if you're stateside. Netflix shows this series in certain countries but not everywhere, so your mileage will vary depending on region. If you want to own episodes, Amazon Prime Video, iTunes, and Google Play commonly sell seasons for purchase or rent. Physical releases (Blu-ray/DVD) were put out in North America by the original licensor, which is handy for collectors. I tend to stick with the legal streams so the creators get paid — and I always end up rewatching the character banter, which never gets old.

The best episodes of 'How Not to Summon a Demon Lord' are the ones that really lean into its over-the-top fantasy comedy vibe while balancing the character dynamics. Episode 3 stands out because it’s where Diablo’s dual nature—awkward gamer vs. overpowered demon lord—gets hilarious play during the bath scene with Rem and Shera. The animation team clearly had fun exaggerating the absurdity of his internal panic versus his cool exterior. Then there’s Episode 6, where the show’s combat shines; Diablo’s fight against the Paladin is a visual treat, blending flashy magic effects with his trademark smugness. Another highlight is Episode 10, which dives into Rem’s backstory. The tone shifts to something more poignant, and the emotional weight actually lands thanks to the buildup. It’s a great example of how the series occasionally swaps fan service for genuine character depth. For pure fun, though, Episode 12’s finale delivers with a satisfyingly chaotic boss battle and just enough loose ends to make you wish for a second season (which we thankfully got!).

On paper, 'How Not to Summon a Demon Lord' looks like a typical fantasy-comedy, but in practice it's a mixed bag for teens. I watched it with an eye for both plot and tone, and what stands out most is how heavily it leans into ecchi and fanservice—there are frequent scenes of sexualized situations, revealing outfits, and a lot of jokes built around embarrassment and borderline humiliation. Violence exists too, mostly fantasy combat that’s not graphically gory but still intense at times. If I had to give practical guidance, I’d say mid-to-late teens who are comfortable with sexual content and can separate fantasy from real-world behavior might handle it okay. Younger teens or those sensitive to sexualized humor would probably find several scenes uncomfortable. It also depends on the viewer’s maturity and parental values: some might see it as harmless comedy while others will find the portrayal of consent and power dynamics problematic. Personally, I enjoy the series for its silly moments and the central character’s awkwardness, but I’d hesitate before letting a young teen binge it without context.

If you want a straightforward place to legally stream 'How Not to Summon a Demon Lord', I usually point people toward Crunchyroll first. They’ve carried both seasons in many regions, with subtitles and often the English dub too. After the Funimation–Crunchyroll consolidation most of the catalog moved under Crunchyroll’s umbrella, so it’s the most consistent spot I check. Beyond that, I've found episodes on Hulu in the U.S. at times, and Netflix or Amazon Prime Video will sometimes host the show depending on your country — Netflix’s catalog changes regionally a lot. If you prefer owning it, digital purchases on Amazon or iTunes and physical Blu-rays (from the show's licensors) are great for supporting the creators. For fans in China, platforms like Bilibili have streamed it officially. I usually double-check the app on my TV and my local storefront before deciding whether to subscribe or buy a season; that way I don’t miss the dub or special extras. Honestly, it’s fun revisiting Diablo’s awkward confidence no matter where I watch it.