As a daughter of nobility, Apple Arden is expected to take part in the Crown Princess Audition. But one day, a never-before-seen girl named Rose arrives at their family home wishing to be adopted into the Viscount Arden family for her own chance to become the next crown princess. When that doesn’t work, she offers to buy the family’s candidacy to participate. The family accepts her generous offer, but Apple can’t help but notice how strange everyone has become since Rose’s arrival. Nonetheless, and Apple becomes Rose's lady-in-waiting as support, and declares to support Rose by participating in the auditions. But why is everyone in Apple's family acting strangely ever since Rose's arrival?