The novel "Amantip" in the Rainbow Bookstore series follows a world on the brink of collapse as demons invade the human realm, a village with the sealed Demon King's sword disappears, and the prince on the quest for the sword goes missing. Real-world character Xiaodou Ya enters the book to find the prince, aiming to restore order amidst the chaos, with everything beginning from Xiaodou Ya's mischievous actions.