In "The Curse of the Blue Moon," Miyel, Romin, Ara, Oren, Ruren, and Nina are six sisters who have no idea what's in store for them as they unwittingly fall under an ancient curse. As the blue moon appears in the sky for seven consecutive nights, the sisters' personalities start to change in unpredictable ways, causing their behavior to spiral out of control. Meanwhile, trouble is brewing in the Miyoji Castle, where the sisters' friends are trying to protect the little princess from harm. But when the little princess is assassinated by an unknown attacker, her older sister is forced to take over as head of the noble family. As the sisters struggle to break the curse and deal with the fallout from their friends' actions at the castle, their world is turned upside down in this gripping tale of magic, mystery, and intrigue.