Sleepy Princess in the Demon Castle

In an ancient era where humans and demons coexisted in a state of perpetual disharmony, the Demon King abducts a human princess named Syalis and confines her within his imposing castle. Her distressed subjects mourn her capture until a courageous hero emerges to lead a dedicated rescue mission on her behalf. However, while waiting for her savior to arrive, Princess Syalis faces an unexpected challenge: absolute boredom. Despite being guarded by peculiar bat-winged teddy bears, life inside her dungeon cell offers little stimulation. To pass the endless hours, she resolves to do what she does best—sleep. Yet achieving true rest proves far more difficult than anticipated. Plagued by stubborn insomnia and a lack of comfort, the determined princess embarks on a relentless quest throughout the demon fortress to secure the perfect night's sleep.