My name is Ada. A commoner who lived peacefully with her mother, she was left alone at the age of six when her mother went to work saying she would be back by dinner and never returned. The landlord of the boarding house took her in, and she grew up in the downtown area alongside the landlord’s daughter, Charlotte. Among the few possessions Ada’s mother left behind was a single magnificent dress. Charlotte, who had always admired the dress as something fit for a princess, begged to wear it to the prince’s birthday festival, and Ada gladly lent it to her. Charlotte never came home the next day. In her place, a finely dressed noble arrived, and Ada found herself pulled into a web of intrigue surrounding the dress and its hidden secrets. With the help of a prince, Ada sets out to rescue her friend and uncover the truth behind her mother’s disappearance.