About the Sleepy Princess in the Demon Castle Manga Volume 4

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! For teen audiences.