She hasn't even experienced first love yet, and now she's marrying the Emperor (her ex-boyfriend) she just met!? A miraculous reversal of fortune begins! Saint Julietta is forced to marry Lukino, the new Emperor of the Izelta Empire, which is on the brink of defeat, after he brings up a 400-year-old vow. While working tirelessly to protect Lukino and the lives of his people after the defeat, Julietta comes to know the kindness of Lukino, who became Emperor knowing he might be executed!? *"We can still win this war."* Julietta's hidden power will create a miracle from here! A story of a great reversal between a saint and an Emperor!! (Source: Kadokawa, translated)

Princess Lucia, heartbroken after the death of her fiancé, the crown prince of another country, returns to the Kingdom of Fortnato. There, she becomes embroiled in a power struggle for the throne among her four younger sisters, endures harassment, and is eventually driven out of the palace! However, encouraged by Felix, the duke's son, who is drawn to her nobility, Lucia displays her "royal qualities" in her new home! She emerges as the leading candidate for queen—!? (Source: Kadokawa, translated)