According to the promise made to the kingdom of Terrapema, the Grand Duchy of Patria was obliged to marry on the orders of the Crown Prince when the Princess turned 15 years old. Although the date of the wedding is coming up. The identity of the Grand Princess is still unknown.
In a rural village in Patria, Lapis, a pretty girl, the child of an ordinary family, suddenly finds herself studying for the entrance exam to the court’s bridal school. Caught in adult tricks, how far can this innocent girl go?