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The time when humans and demons once existed. A demon king, the existence that throws off that balance of perfect stability, kidnapped a human princess and confined her in his own castle.

People raged, and sent a hero on a journey to rescue the princess to the castle she was confined in. She was supposed to be weeping, despairing, and waiting for a rescue, but... Having so much spare time, aside from sleeping she has noting else to do.

Now, the "imprisoned princess" does as she likes in the demon king's castle in a seek of a quiet sleep!

This is a sleeping short comedy!!

Artworks

Chapters

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Chapter 46: Looks Like We Have a Master of All Trades
1 day ago
Chapter 45: The Girl Visiting Many Demon King Castles
October 12, 2017
Chapter 44: Create and Sing
October 6, 2017
Chapter 43: Attack!! Forehead Devil Subspecies!
October 1, 2017
Chapter 42: Which Child Sleeps the Most?
September 25, 2017
Chapter 41: Spine-chan Doesn't Sleep
September 19, 2017
Chapter 40: Chocolate is the Colour of Blood, the Colour of Love
September 17, 2017
Chapter 39: Keeping Secrets Isn't Good!
September 4, 2017
Chapter 38: Demon King-sama's Sleep or Die
August 24, 2017
Chapter 37: A Perfectly Happy Prisoner
August 24, 2017
Chapter 36: God's Move in Dream
August 24, 2017
Chapter 35: Sweet Dreams in the Outskirts of Demon King Castle
August 24, 2017
Chapter 34: Springy ♡ Princess
August 24, 2017
Chapter 33: Stop Getting Serious in a Party Game!
June 12, 2017
Chapter 32: Because the Princess is a Naughty Girl
June 12, 2017
Chapter 31: Although I got merged with a cat, isn't that okay...?
June 12, 2017
Chapter 30: I Can Upgrade the Window!
June 12, 2017
Chapter 29: Princess' Panties are Good Panties
June 12, 2017
Chapter 28: Totally Fluffy Futon Taxi
June 12, 2017
Chapter 27: The Sloth Making Machine
June 12, 2017
Chapter 26: Demon King Castle (Sleep) Paralysis Play
June 12, 2017
Chapter 25: On a Cradle Unto the Grave
June 12, 2017
Chapter 24: My Laundry Path
June 12, 2017
Chapter 23: I'm Going to Visit You Tonight
June 12, 2017
Chapter 22: Guardian of the Quiet Sleep
June 12, 2017
Chapter 21: Why Can't Honey Be Produced From Nothing?
June 12, 2017
Chapter 20: A Flower's Life is Short
June 12, 2017
Chapter 19: Badump! The Training Tournament Filled With Demons
June 12, 2017
Chapter 18: Friend (Futon)
June 12, 2017
Chapter 17: She Looks Like the Princess and has the Same Brains as Her Too
June 12, 2017
Chapter 16: Princess Finisher-sama
June 12, 2017
Chapter 15: Innocent Villain
June 12, 2017
Chapter 14: The Steam Killing Demon
June 12, 2017
Chapter 13: Head to the Sacred Treasure Forest!
June 12, 2017
Chapter 12: The Sea of Pillows and the Tower of Babel
June 12, 2017
Chapter 11: You Won't Go Down Unless You Touch It
June 12, 2017
Chapter 10: Schlaf' ein holdes Kind
June 12, 2017
Chapter 9: But, It's a Heavy Price to Pay, Isn't It?
June 12, 2017
Chapter 8: The Princess's Three-Star Armour
June 12, 2017
Chapter 7: The Dreaming Poison Mushroom
August 30, 2016
Chapter 6: Keep Howling at the Moon
August 30, 2016
Chapter 5: Because There's a Tower There
August 30, 2016
Chapter 4: Sleeping with the Wind Shield... and Nothing Else
August 30, 2016
Chapter 3: A sweet sleep known as death
August 30, 2016
Chapter 2
August 30, 2016
Chapter 1
August 30, 2016

Other Facts

PublishedMay 11, 2016 to ?
SerializationShounen Sunday
Last Updated1 day ago
LanguagesEnglish, Japanese
Other namesSleeping in Devil's Castle, 魔王城でおやすみ, Sweet Dreams in the Demon Castle, 在魔王城说晚安