Sleepy Princess in the Demon Castle manga volume 4 features story and art by Kagiji Kumanomata.

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. And how can she put a stop to the Teddy Demons summoning her every time they get into a kerfuffle…?

Then the princess gets kidnapped from her kidnappers!