Sleepy Princess in the Demon Castle Series by Kagiji Kumanomata, 熊之股鍵次

She decides to while away the hours by sleeping, but getting a good night’s rest turns out to be a lot of work! She begins by fashioning a DIY pillow out of the fur of her Teddy Demon guards and an “air mattress” from the magical Shield of the Wind. The princess’s hapless demonic guards soon discover that their captive expects to be treated like, well, a princess... moreShe decides to while away the hours by sleeping, but getting a good night’s rest turns out to be a lot of work! She begins by fashioning a DIY pillow out of the fur of her Teddy Demon guards and an “air mattress” from the magical Shield of the Wind. The princess’s hapless demonic guards soon discover that their captive expects to be treated like, well, a princess. Things go from bad to worse—for her captors—when some of Princess Syalis’s schemes end in her untimely—if temporary—demise and she chooses the Forbidden Grimoire for her bedtime reading… less

While waiting to be rescued, Princess Syalis makes herself at home by commandeering a bathtub, befriending (sort of) a cute demon girl and participating in a castle fitness challenge. Her plots to get some shut-eye include stealing ice from Ice Demons to cool off on a hot summer night, attempting to make her own waterbed, toying with magic spells and provoking an enchanted flower into releasing a soporific. And then the nightmares begin…

A captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Winter has come, and Princess Syalis will do anything to stay warm, including creating a DIY magical device (known as a “Ko-tatsu”), knitting woolen underwear and trying to convince the castle blacksmith to make her a window to keep out the drafts. When she accidentally dies yet again—along with Stamper Cat—curious resurrection complications ensue... moreA captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Winter has come, and Princess Syalis will do anything to stay warm, including creating a DIY magical device (known as a “Ko-tatsu”), knitting woolen underwear and trying to convince the castle blacksmith to make her a window to keep out the drafts. When she accidentally dies yet again—along with Stamper Cat—curious resurrection complications ensue. Then it’s Christmas and New Year’s! Who will the Demon King designate as naughty or nice? And will all of the other demons let poor Syalis join in any demon games…? And now the Demon King has insomnia! less

A captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Valentine’s Day arrives, and Princess Syalis is hard put to get the haul of chocolate she’s accustomed to receiving back home in her kingdom. Her latest plots to get a better night’s rest include learning to hibernate, becoming a ghost and getting an annoying earworm out of her head... moreA captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Valentine’s Day arrives, and Princess Syalis is hard put to get the haul of chocolate she’s accustomed to receiving back home in her kingdom. Her latest plots to get a better night’s rest include learning to hibernate, becoming a ghost and getting an annoying earworm out of her head. Now how can she put a stop to the Teddy Demons summoning her every time they get into a kerfluffle…? Then the princess gets kidnapped from her kidnappers! less

A captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Princess Syalis comes to the surprising conclusion that being good will earn her a good night’s sleep! But none of the demons trust her sudden transformation. The princess’s latest dilemmas include a growing urge to use the bathroom when it’s out of order, her pet Eggplant Seal outgrowing her quarters, and growing into a giant instead of up... moreA captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Princess Syalis comes to the surprising conclusion that being good will earn her a good night’s sleep! But none of the demons trust her sudden transformation. The princess’s latest dilemmas include a growing urge to use the bathroom when it’s out of order, her pet Eggplant Seal outgrowing her quarters, and growing into a giant instead of up. And then it’s time for the castle’s Hostage Reeducation Week… Plus, a visit to demon preschool! less

A captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Accompanied by an entourage of demon guards, Princess Syalis takes a field trip to the human world to acquire a special pillow... moreA captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Accompanied by an entourage of demon guards, Princess Syalis takes a field trip to the human world to acquire a special pillow. Then she receives several invitations from her demon captors: first, to replace the cooks who have succumbed to heat exhaustion in the Demon Castle kitchen (somebody needs to make Quilladillo’s Monster Bird Egg Custard); second, to attend a pajama party (despite being woefully ignorant of the concept); and third, to design a new area for the hero to explore (which turns out to be the exact opposite of what the demons commissioned). less

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. Then, when the newly hired demon staff arrive for their orientation at the Demon Castle—complete with a hot springs retreat!—the current staff are loath to admit that they’ve lost control of their hostage... morePrincess 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. Then, when the newly hired demon staff arrive for their orientation at the Demon Castle—complete with a hot springs retreat!—the current staff are loath to admit that they’ve lost control of their hostage. What will happen when the newbies discover that the “Scissors Demon” is actually a terrifying, bratty human girl?! less

Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Celebrate New Year’s, Valentine’s Day, and a very special pajama party at the Demon Castle with the princess and her demon friends—er, captors! Then the Five Rings athletic tournament captures the imagination of demons and human alike. But when one of the athletes turns the demons’ human friend—er, hostage—into a besotted fangirl, the castle staff doesn’t take it well... moreKidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.Celebrate New Year’s, Valentine’s Day, and a very special pajama party at the Demon Castle with the princess and her demon friends—er, captors! Then the Five Rings athletic tournament captures the imagination of demons and human alike. But when one of the athletes turns the demons’ human friend—er, hostage—into a besotted fangirl, the castle staff doesn’t take it well. Also, Syalis imbibes a potion that induces her greatest fear, Demon King Twilight desperately tries to change his image, and the hero Dawner adds a certain someone to his unwelcome rescue party. less

Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.The Demon King and his troops travel to a demilitarized zone bordering the demon world and the human world for some intense physical training alongside their human counterparts. When one group mocks the other, Syalis is hell-bent on putting them in their place! While the Demon Castle recovers from boot camp, the princess saves the day…and wrecks it even more... moreKidnapped by the Demon King and imprisoned in his castle, Princess Syalis is…bored.The Demon King and his troops travel to a demilitarized zone bordering the demon world and the human world for some intense physical training alongside their human counterparts. When one group mocks the other, Syalis is hell-bent on putting them in their place! While the Demon Castle recovers from boot camp, the princess saves the day…and wrecks it even more. Then, an integral member of the Demon Castle staff resigns and heads for home…with the rest of the demons and one human in hot pursuit! less

栖夜醬，人界發生不得了的大事了…！！　　在那個人與魔物征戰的時代，　　當栖夜莉絲公主正在享受她的人質生活時，　　母后‧音無莉絲女王卻突如其然地駕臨了魔王城！？　　馬上就被關入牢房的音無莉絲女王如此說道…　　「除了睡覺，根本無事可做啊…」　　為了哄母后開心，栖夜莉絲可是卯足了全力！　　面對這對人質母女的恣意妄為，　　十傑眾究竟有沒有辦法當面抱怨出來呢！？　　本集還收錄了在刺刺醬老家過年篇！

Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored.The sun shines on the Demon Castle…but it’s supposed to be perpetual night in the demon world! Then Zeus—Poseidon and Hades’ little brother—joins the Demon Castle staff. Everyone is in awe of him except the princess, who quickly finds ways to use the most powerful of the mythological gods to help her achieve her personal goals—sleeping better and opening a cat cafe... moreKidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored.The sun shines on the Demon Castle…but it’s supposed to be perpetual night in the demon world! Then Zeus—Poseidon and Hades’ little brother—joins the Demon Castle staff. Everyone is in awe of him except the princess, who quickly finds ways to use the most powerful of the mythological gods to help her achieve her personal goals—sleeping better and opening a cat cafe. Then, in a stunning reversal of fortune, an important castle resident is taken hostage! Will Syalis help or hinder the rescue team’s efforts? less

A captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored... moreA captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored.The prestigious Royal Demon Academy needs to be inspected, but who is best suited for the job when former Demon King Midnight has, so to speak, shrunk from the task? Not the ones who end up going! In metafictional rather than supernatural news, when the gang finds out an anime is being made of Sleepy Princess in the Demon Castle, everyone vies for a starring role. Unfortunately, watching the show when it airs turns out to be a major challenge. Worse, when Syalis doesn’t get resurrected in a timely manner after one of her little “accidents,” she turns into…Zombie Princess! less

A captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored.When Teddy Demon gets into a fight with Eggplant Seal, the cuteness is un-bear-able. And then Teddy Demon gets lost and encounters the inept rescue party led by the hero Dawner. Meanwhile, Quilladillo’s fitness regimen doesn’t come without its drawbacks…for the princess... moreA captured princess just wants a good night’s sleep! Shhh…Kidnapped by the Demon King and imprisoned in his castle, Princess Syalis is...bored.When Teddy Demon gets into a fight with Eggplant Seal, the cuteness is un-bear-able. And then Teddy Demon gets lost and encounters the inept rescue party led by the hero Dawner. Meanwhile, Quilladillo’s fitness regimen doesn’t come without its drawbacks…for the princess. Plus, brothers Poseidon and Hades bond over a common weakness, Midnight finds a new prime suspect to blame for shrinking him, and Great Red Siberian sheds! less