اختطفت ملك الشياطين الأميرة سياليس من منزلها. على الرغم من الرعب الكامن في قلعة الشيطان، فإن كل ما تريده الأميرة سياليس هو نوم هانئ.

بينما يواجه البطل أكاتسوكي عقبات خطيرة لإنقاذ الأميرة سياليس، تستمر الأميرة في إيجاد طرق إبداعية للنوم براحة أكبر.

Princess Syalis is on the loose again meddling with forbidden magical items and causing total mayhem for the Demon Castle.

Fed up with her circumstances at the Demon Castle, Princess Syalis goes to great lengths to add luxuries to her castle prison.

The female unit, long deployed out in the field, has returned to the Demon Castle to get their first taste of Princess Syalis.

Dawner the Hero is having more trouble than expected on his journey to the Demon Castle, so the demon higher ups decide to take some action.

Princess Syalis wakes to find herself in a completely different castle! What happened and how will she return to the Demon Castle?

Back at the Demon Castle, Princess Syalis interrupts an important meeting to share about her haunted dreams.

It’s time for Princess Syalis to start acting like a proper hostage, so the demon king issues a decree to help change that.

Princes Syalis is determined to get her hands on the latest and greatest sleep product, but it’s only available in the Human Realm.

Princess Syalis feels tired no matter how much sleep she gets, and her troubling dreams aren’t helping.

Despite living as a captive in the Demon Realm, the princess writes a letter to Santa. The letter’s contents shock the demon king.