Sleepy Princess in the Demon Castle

Princess Syalis is abducted from the Nation of Goodereste by Twilight the Demon King; despite the horrors lurking in the castle, all Princess Syalis wants is a good night's sleep.

Dawner the Hero faces dangerous obstacles to rescue Princess Syalis, but the princess is focused on finding ways to sleep more comfortably at the Demon Castle.

Princess Syalis is on the loose again, meddling with forbidden magical items and creating total mayhem in the Demon Castle.

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

The female unit, long deployed in the field, finally return to the Demon Castle and get their first taste of Princess Syalis.

Dawner the Hero has more trouble than expected on his journey to the Demon Castle, and the demon higher-ups take action.