Sleepy Princess in the Demon Castle Vol. 4 (manga)

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. Now how can she put a stop to the Teddy Demons summoning her every time they get into a kerfluffle…? Then the princess gets kidnapped from her kidnappers!