Sleepy Princess in the Demon Castle manga volume 22 features story and art by Kagiji Kumanomata.

The Monster Bird Egg Association’s efforts to poach Cursed Musician prove short-lived after Syalis realizes Odile’s true motivations. Meanwhile, Silmoth brings some much-needed experience and dignity back to the Ten Guardians - right up until the princess enters the scene - and the residents of the Demon Castle discover the power of partying. Twilight is forced to decide whether a personal invitation to the Wild Avian Hotel is a deadly trap or a fun-filled opportunity. Plus, puppies powering up, popularity polls, and pugnacious plants!