Kaibutsu Oujo S01E26 - Sleeping Princess

DVD only release.

Flandre has gone missing inside the mansion. Reiri, Riza, Hiro, and Hime each realize their powers do not work somehow. Hime deduces that the four of them are trapped in a same nightmare, after proving to them that setting a curtain on fire was just an illusion. Flandre, who is not in the nightmare thereby unaffected, tries to find a way to wake them up. The four of them encounter many enemies they faced in the past, but they remind themselves that the enemies are imaginary. Hime figures out that they are inside Hiro's dream. Flandre contact Sherwood, Francisca, and Ryu-ryu for help. Flandre and Francisca scan the area, while Sherwood and Ryu-ryu enter the nightmare, since there is some sort of energy causing them to sleep. Sherwood finds the creature responsible and Hime slashes it, thus ending the nightmare.