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Sleepy Princess in the Demon Castle Season 2 release date: Maoujou de Oyasumi Season 2 predictions

Sleepy Princess Anime
The Sleepy Princess Season 2 anime will introduce the family of Demon King Twilight and the history behind the war between demons and humans. Pic credit: FUNimation

The Sleepy Princess in the Demon Castle Season 2 anime will continue the story of Princess Sya (Aurora Sya Lis Goodereste) as she seeks more “zzz’s” while accidentally improving demon/human relations with Demon King Twilight’s army… and his father!? But when will Maoujou de Oyasumi Season 2 come out?

“The story that began with the captive princess and the Demon Kings turned into the scariest princess and the gentle and entertaining friends of the Demon Castle!” said Princess Sya voice actress Inori Minase. “It was a project that taught me the fun of interacting with each other and the depths of gag acting. I’m still haven’t had enough play and sleep, so I’m hoping for another opportunity!”

The first season of the anime was produced by Japanese animation studio Doga Kobo, which also produced the Ikebukuro West Gate Park anime in the same 2020 time frame. The studio is best known for adapting manga slice-of-life comedies like Asteroid in Love, How Heavy Are The Dumbbells You Lift?, and New Game!

So, arguably, they’re the perfect fit for making Sleep Princess Season 2. Most of the main staff has worked together in the past for studio Doga Kobo.

For the first season, the anime project was helmed by director Mitsue Yamazaki, who is best known for directing How Heavy Are The Dumbbells You Lift?. His action chops come from being an episode director on the Bleach anime series (the Bleach Season 17 release date is set for 2021).

Writer Yoshiko Nakamura (Re:Zero Season 2) wrote the series composition. Artist Ai Kikuchi (How Heavy Are The Dumbbells You Lift?, New Game!) was the character designer. Composer Yukari Hashimoto (How Heavy Are The Dumbbells You Lift?, March Comes In Like A Lion) created the series’ music.

The Sleepy Princess in the Demon Castle Season 2 OP (opening) and ED (ending) theme song music have not yet been announced.

For the first season, the Sleepy Princess OP was “Sleep! A Good Night’s Sleep! Syalist Life (Kaimin! Anmin! Syalist Seikatsu)” as performed by Inori Minase, the Japanese voice actress for Princess Sya.

In a November 2020 interview, the director noted that the OP alone has over 1,800 drawings for the animation. Considering that entire episodes will sometimes be in the 3,000 to 4,000 range that’s pretty crazy!

(On a quirky side note, Minase also voices the demon maid Rem in Re:Zero. The Demon Cat Stamp from Sleepy Princess Episode 2 was voiced by Satomi Arai, who voices Beatrice from Re:Zero.)

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The ED was “Gimmme!” as performed by ORESAMA.

Here’s an awesome 8-bit version of the OP.

The first season’s finale, Sleepy Princess in the Demon Castle Episode 12, released on December 21, 2020 (December 22 in Japan).

  • February 22, 2021: FUNimation’s Sleepy Princess in the Demon Castle English dub release date announced.

This article provides everything that is known about Sleepy Princess in the Demon Castle Season 2 (Maoujou de Oyasumi Season 2/Sleepy Princess Season 2) and all related news. As such, this article will be updated over time with news, rumors, and analysis. Meanwhile, let’s delve down into what is known for certain.

FUNimation’s Sleepy Princess in the Demon Castle English dub released

The first season was streaming in Fall 2020 with English subtitles on FUNimation Now, AnimeLab, and Netflix Japan (but not Netflix U.S.). The Sleepy Princess English dub didn’t come out until 2021.

Kira Buckland voiced the titular heroine Princess Syalis.

FUNimation’s Sleepy Princess in the Demon Castle English dub released on February 22, 2021, with new dubbed episodes coming out over time. Let’s just hope the Sleepy Princess in the Demon Castle Season 2 English dub is also announced by FUNimation.

Maoujou de Oyasumi Season 2 release date predictions

As of the last update, studio Doga Kobo or any company related to the production of the anime has not officially confirmed the Maoujou de Oyasumi Season 2 release date. Nor has the production of a sequel been announced.

Once the news is officially confirmed this article will be updated with the relevant information.

In the meantime, it’s possible to speculate about when, or if, the Sleepy Princess in the Demon Castle Season 2 premiere date will occur in the future.

From a financial perspective, the first week of Sleepy Princess Blu-Ray disc sales was not good, only selling 1,093 copies. But maybe it’ll become a sleeper hit? (Ba-Dum-Tss!)

From a review standpoint, the Sleepy Princess anime has done better than most of Doga Kobo’s previous works. Notably, the last anime they’ve produced that’s scored as well was New Game!, and it received a second season.

While popularity can lead to financial success via streaming revenue and thus second seasons the major issue is scheduling. Anime productions need to be scheduled out years in advance.

Studio Doga Kobo typically produces three to five anime projects per year. For 2021, they’ve already announced the singing idol anime Selection Project and the anime adaptation of the A Romantic Comedy Where the Childhood Friend Absolutely Will Not Lose light novel series.

They’re also adapting the My Senpai is Annoying manga in an unknown year. In 2022, the studio is adapting a story by Hajime Shinagawa called Mobius Dust.

In the best-case scenario, the Sleepy Princess Season 2 anime production is already planned and it could be scheduled for 2022 at the earliest. Otherwise, anime fans should expect a multi-year wait.

Maoujou de Oyasumi Manga Sleepy Princess Manga
With over 200 chapters, the Sleepy Princess manga series shows no sign of slowing down. Pic credit: Kagiji Kumanomata

Sleepy Princess in the Demon Castle manga compared to the anime

The story for the anime is based on the Sleepy Princess in the Demon Castle manga series by writer/illustrator Kagiji Kumanomata. Serialized in Weekly Shonen Sunday since May 2016, the Maoujou de Oyasumi manga was up to Volume 17 as of December 18, 2020.

In June 2018, VIZ Media began publishing the official English translation of the Sleepy Princess in the Demon Castle manga in North America.

The English Sleepy Princess manga was up to Volume 13 as of October 2020. Volume 14 is scheduled to release on April 13, 2021, and Volume 15 on August 10, 2021.

(You can also find a cute Sleepy Princess demon teddy bear plush doll on Amazon.)

Sleepy Princess Volume 7
The Sleepy Princess in the Demon Castle Season 2 anime will pick up the story again in the middle of manga Volume 7. Pic credit: Kagiji Kumanomata

The anime managed to package the cutesy-yet-murder-y passion of the manga series into 12 delightful episodes. Yet the anime is definitely not a straightforward panel-by-panel adaptation.

Sometimes even scene details are changed up. For example, when the Princess acquired the tire armor in the manga she sicked an army of Teddy Demons on the Tire Genie.

The quests of Hero/fiancee Sir Dawner are usually just brief asides in the manga, but the anime greatly expanded D-Whatsit’s scenes with extra details and action. There are also more of the Princess’s internal monologues.

After Hades is introduced, sometimes the manga delves into multi-chapter story arcs like Hostage Awareness Week. But most of the manga chapters are standalone quests arranged in an episodic format.

Here’s a guide to how the anime adapted the Sleepy Princess manga (note that some events were reordered):

  • Sleepy Princess Episode 1: Chapters 1, 2, 4, 3
  • Sleepy Princess Episode 2: Chapters 5, 6
  • Sleepy Princess Episode 3: Chapters 10, 11, 13
  • Sleepy Princess Episode 4: Chapters 14, 15, 8 (partial), 17
  • Sleepy Princess Episode 5: Chapters 18, 28, 37
  • Sleepy Princess Episode 6: Chapters 24, 29, 38
  • Sleepy Princess Episode 7: Chapters 45, 46, 47, 48(partial)
  • Sleepy Princess Episode 8: Chapters 52 (partial), 53, 58, 57
  • Sleepy Princess Episode 9: Chapters 9 (partial), 16, 63, 64, 65
  • Sleepy Princess Episode 10: Chapters 66, 67, 68
  • Sleepy Princess Episode 11: Chapters 70, 72, 74, 77, 86
  • Sleepy Princess Episode 12: Chapters 81, 82, 83, 84, 33 (partial), 32 (partial)

As can be seen, the anime episodes tend to bounce around a lot in the source material in its attempt to connect chapters focused on certain characters and topics. (The Wandering Witch: The Journey of Elaina anime similarly bounced around in the light novel chapters.)

For example, Episode 5 jumped ahead to Chapter 37 in order to introduce the female warriors like Neo Alraune. Then the two chapters about Harpy, 18 and 28, were adapted back-to-back.

Since Harpy’s pajamas party plans were mentioned it made sense for Sleepy Princess Episode 11 to adapt Chapters 70, but only after the intervening character developments caused the demons to grow closer to their human “hostage”. Otherwise, Demon Cleric’s actions wouldn’t have made any sense.

The odd part is that Episode 11 adapted the pajama party practice but then skipped the actual pajama party in Chapter 71. This was probably done so Cubey the succubus could practice being a body double, which sets up the narrative for Episode 12.

Unfortunately, some character chapters were skipped in the process. For example, the human bounty hunter Kukororo was of Chapter 12 was removed entirely, but that’s a minor character.

Even the manga creator was sad that the anime didn’t have enough episodes to fully portray more important characters.

“I’ve run out of time! I think people should read the original [the manga]. At the moment, there are 16 books + fan books,” tweeted Kagiji Kumanomata. “There may be a leading role character that does not appear too much in the anime because there are about 220 chapters. Huff…”

Although it’s unclear which character the manga creator was referring to, Poseidon’s introduction chapter was skipped once Chapter 37 was adapted. Since Poseidon was shown continuously in big meetings it didn’t make sense to revisit that chapter, but the character should be given an episode in Sleepy Princess Season 2 that’s based on Chapter 90.

Other characters were introduced earlier than the manga. For example, the Princess-body-double/succubus Succyun (Cubey/Bussy) was introduced in Episode 8 during the dentist segment that adapted Chapter 58, but Succyun was originally introduced in Chapter 74 after it’s mentioned in Chapter 73 that the Princess worse Cubey’s outfit as a costume during Halloween.

Sleepy Princess Anime
The Sunrise Stand pose referenced by the Sleepy Princess anime was designed by the famous animator Masami Obari. Both the anime and manga have many references to famous works. Pic credit: FUNimation

Based on the fact that Cubey was introduced earlier, the finale, Sleepy in the Demon Castle Episode 12, ended by adapting a story arc in Volume 7. The episode’s ending also pulled certain elements out of earlier Christmas-related chapters that were skipped.

It’s a good stopping point that’s focused on the Princess returning home during Christmas time that also involves the succubus in a central role. It also works as an ending since it resets the story back to square one.

The good news is that such a stopping point leaves plenty of room for Sleepy Princess in the Demon Castle Season 2 since there are well over 200 chapters.

Better yet, English-only anime fans who wish to read ahead of the anime can jump straight to Chapter 85 of Volume 7. But it’s still recommended that manga readers go back and read the chapters skipped by the anime (although, it’s possible Sleepy Princess Season 2 could back up and adapt some of the skipped chapters that were standalone stories).

Sleepy Princess Season 2 anime spoilers (plot summary/synopsis)

Despite having been captured several years ago, the easily lost hero still can’t seem to find his way to the demon castle. The Princess now feels like the castle of Demon King Twilight is her home.

By skipping some of the earlier quest-focused chapters the anime dipped down into the overall story of how relations became the way they are now. It’s openly voiced whether it’s possible for demons and humans to be friends… and Episode 11 openly asked, “Can humans and demons be in love?”

Episode 12 had the kingdom of Goodereste announcing that something major had changed in the war. During the Princess’s speech to the kingdom of Goodereste, she announced her feelings that it was her duty to facilitate the relationship between the demons and humans so she needed to stay in the demon castle.

Despite all her high words about changing the nature of the war, when the Princess gets home she’s more focused on being mortified that people know her secret: that she has a short tongue. After giving up on the idea of murdering everyone who knows her secret, the Princess engages in intensive tongue training with the help of Majiro the Spiny Hedgehog (Quilladillo).

Sleepy Princess Season 2
Poseidon and the Princess will team up in Sleepy Princess Season 2. Pic credit: Kagiji Kumanomata

A common enemy causes the Princess and Poseidon to team up. It turns they have a shared fear of needles for flu shot injections. And with the whole castle requiring vaccinations, the two go on the run together and seek “big brother” Hade’s help.

While they are unsuccessful at avoiding, the poor Princess is also unsuccessful in getting vaccinated in time and finds herself sick! Demon King Twilight finds himself closer than expected to the Princess when he finds himself becoming her nursemaid.

Princess Syalis’s luxurious lifestyle is wreaking havoc on the Demon Castle’s budget. When the Demon King cuts back on expenses so that she is no longer supported in the style to which she is accustomed, the princess must find other strategies to satisfy her extravagant tastes.

The Demon King ends up hiring new castle staff and all of the current staff is embarrassed that their supposed “hostage” regularly runs amuck. What will the new demons do once they realize the rumored Scissors Demon is in fact a terrifying human girl?

Finally, the love hijinks pick up in earnest when a disinterested Princess Sya discovers she has a romantic admirer. With all the demons jealous, the Princess must dissuade her weaselly suitor.

When the Demon Cleric botches a resurrection, he finds himself merged with a cute-looking demon. And when the Demon Castle Super Summer Festival begins the Princess finds herself competing in a beauty pageant… against demons in drag!

The summer may be hot but things really heat up when Twilight’s father, the former Demon King Midnight (Oxenthree), comes a calling. Princess Sya may dislike the idea of being a fiancee for the Hero Dawner, but then in Chapter 122 she’s mistaken for being Poseidon’s girlfriend… only for Midnight to believe Sya is Twilight’s wife!

Sleepy Princess Season 2
Demon King Midnight tries to blast his son into bits after mistakenly thinking that Twilight was mistreating his “bride”. How will the temperamental old demon father handle the way his son is running the kingdom? Pic credit: Kagiji Kumanomata

Unfortunately, anime fans will have to wait until the Sleepy Princess in the Demon Castle Season 2 release date to watch what happens next. Stay tuned!


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