The story follows Olivia, a young girl who, upon regaining memories of her past life, realizes she has been reincarnated into the world of a game as the villainous daughter, Olivia. Initially seven years old, she is horrified to discover her role involves bullying her illegitimate half-brother, Eric, who possesses superior magical talent. Eric, a beautiful boy with silver hair and red eyes, is a genius mage who was separated from his mother and subjected to mistreatment in his father's mansion, leading to a yandere personality in the game.
Olivia, however, is captivated by the young Eric's cuteness and immediately resolves to protect him, a stark contrast to her destined role. Her sharp, cold words, intended to ensure Eric receives proper education, are misinterpreted by her father, who finds her behavior amusing and endearing. A unique world-building element is revealed: Olivia's emotions manifest as flowers blooming on her head, visible only to those with significant magical power. Her father, the Duke, delights in observing these floral displays, which reflect her inner state.
Despite Olivia's outwardly harsh demeanor, Eric grows to adore her, seeing her as his "older sister." He diligently improves his manners and studies, reporting his progress to Olivia, who, despite her internal turmoil and desire to praise him, continues to deliver sharp remarks. This dynamic is softened by Eric's persistent requests for tea and macaroons, which Olivia accepts, her hidden joy causing her flowers to bloom profusely. Olivia also intervenes with her mother, convincing her to raise Eric with love and strictness, rather than prejudice, leading to a harmonious family dynamic. A significant deviation from the game's plot is Eric's ability to maintain contact with his birth mother, who works as a maid in a merchant house to avoid scandal.
A surprising revelation occurs when Eric inquires about Olivia's flowers, leading to the discovery that he can see them. This prompts Olivia to question her father, who reveals that Eric is not her half-brother but her cousin. His father, disowned by the Duke, had Eric registered as the Duke's illegitimate child for convenience. Olivia, relieved by this truth and her father's deception, proposes they inform her mother, solidifying their family bond.
A year later, a baby sister named Luna is born, bringing further joy to the family. Olivia, though happy, worries about her role in the game, where she and Eric were the only children. She decides this change is due to her actions preventing Eric's mistreatment. Despite her family's affection, Olivia's sharp tongue and reserved demeanor earn her a poor reputation among new servants, though her family understands her underlying kindness.
At ten years old, Olivia and Eric are invited to a tea party hosted by the Queen, an event where Olivia's engagement to the Crown Prince is destined to occur in the game. Determined to avoid this, Olivia attempts to choose a simple, inconspicuous dress. Her initial attempts to find a suitable designer are thwarted by a flamboyant one, leading her to seek out a new designer, Grace, recommended by Eric's mother. Grace, a talented commoner, designs a beautiful, understated violet dress for Olivia, which her mother also approves.
The tea party begins, and Olivia, despite her anxiety, is excited by the prospect of seeing game characters. She encounters Prince Leonhardt, who is immediately drawn to her. A mishap occurs when a maid spills hot tea on Olivia's hand, causing a burn. Olivia, despite her own pain, prioritizes the maid's well-being and the Queen's reputation, using her limited water magic to cool the burn. This act of kindness, though perceived as cold by some, deeply impresses Leonhardt.
Later, while exploring the rose garden, Olivia's hand is healed by Lilian, a kind girl with healing magic. Lilian is captivated by Olivia's flowers and expresses a desire to be friends. This encounter is interrupted by the arrival of the Crown Prince Leonhardt, Princess Victoria, and the Prime Minister's son, all of whom are drawn to Olivia and her visible emotions. Leonhardt, smitten, insists on holding Olivia's hand, much to her internal distress.
The situation escalates when Leonhardt, driven by a desire to prevent others from taking Olivia, proposes to her through his mother, the Queen. The Queen, impressed by Olivia's character and recognizing the potential for scandal with her visible flowers, agrees to the engagement, provided Olivia's flowers can be made invisible by the time she turns sixteen. The Duke, though initially hesitant, agrees to the engagement with a clause allowing him to annul it if Olivia is ever made to cry. Olivia, now engaged to the Prince, faces a future filled with uncertainty, determined to avoid the villainous fate of her game counterpart.
