The story begins with the protagonist waking up in an unfamiliar, yet familiar, room, only to discover she has been reincarnated as Rosalia Rosenberg, the villainess from an otome game she played. Her body is that of a three-year-old, with striking blue-silver hair and amethyst eyes. The shock of her impending death, a frequent occurrence in the game for Rosalia, is immense. Determined to live a happy life, she resolves to change her fate.
Rosalia learns that Rosalia's downfall stems from her mistreatment of the heroine, leading to three main ruinous endings: execution for plotting the heroine's murder, assassination by those she wronged, or being defeated by a knight while attempting to harm the heroine. An exile ending is also mentioned, which Rosalia believes she can manage. Her immediate goal is to improve her relationships with her cold family: her workaholic father, her sickly mother who is destined to die young, and her older brother, Rupert.
Her brother, Rupert, is a gentle-looking boy with green eyes and a fondness for books, particularly those about plants. Rosalia approaches him, initially asking to play, but when he refuses, she suggests studying plants in the garden using his book. Rupert agrees, and they visit the garden, which he reveals is filled with poisonous plants. He playfully teases her, but then explains his intention was to teach her about the dangers. Rosalia, recalling her game knowledge, impresses Rupert by discussing the medicinal and poisonous properties of plants. He offers to bring her lilies of the valley, which she likes, and she declares her love for him, leading to a warm embrace.
Later, Rosalia focuses on her mother's poor health, which she attributes to a poor lifestyle. She enlists the help of the family chef, Dan, to prepare meals that cleverly hide vegetables. She also plans to encourage her mother to exercise. However, her mother's lack of stamina is so severe that even a short walk proves exhausting.
A significant event occurs when Rosalia expresses her liking for lilies of the valley, and the next day, her room is filled with an overwhelming amount of them. This is revealed to be the work of a nature spirit, who grants her the name "Sui" and a gift of lilies. Rosalia discovers she can use wind magic, a skill she uses to manage the excess flowers. She also realizes she has a knack for communicating with and receiving blessings from spirits, a trait that surprises her brother and the gardener, Tom. She learns that her brother, Rupert, also has a spirit, a green spirit named Phil.
The narrative then shifts to Rosalia's interactions with her father, a stern and seemingly unapproachable man. She bravely approaches him to bid him farewell before he leaves for work, a gesture that deeply moves him. Her father, a high-ranking official, is overwhelmed by her simple act of kindness, revealing his own exhaustion and stress. Rosalia's efforts to improve her family's relationships continue, with her mother showing improved health and even managing a walk in the garden.
Rosalia accompanies her father to his workplace, the castle. While he attends to his duties, she discovers his office is drowning in paperwork. She devises a system for organizing documents and proposes standardized forms, which her father immediately adopts, impressed by her intelligence. She also learns that her father's stern demeanor often stems from misunderstandings and his own stress.
During a chaotic incident at the castle, where her father's emotional distress causes a magical blizzard, Rosalia is separated and gets lost. She encounters a majestic golden lion, a sacred beast, who helps her find her attendant, Arc. She also receives assistance from a wind spirit named Hal, who helps her communicate with her father.
The story culminates with the revelation that Rosalia has received multiple spirit blessings, a feat considered extraordinary for her age. Her family, unaware of these events due to a deliberate omission by their maid, Martha, plans a belated celebration. Rosalia, along with her spirits Sui and Hal, helps her father and Arc efficiently complete their work, further solidifying her family's affection and her own growing capabilities.
