A man wakes up to find himself inhabiting the body of Duke Kalis Fall, the cold and indifferent father of a young girl named Laurier. The duke he has replaced had kept his own family at a distance, creating a tense and unhappy atmosphere within their household. As the man adjusts to his new life, he recalls fragments of an otome game from his previous existence. To his growing alarm, he realizes that his own daughter, Laurier, is fated to be the story's villainess, a role that would ultimately lead to her ruin.

Determined to change this tragic destiny, the reincarnated father makes a solemn vow. He will dedicate himself to showering his wife and daughter with genuine love and affection, hoping to heal his fractured family and prevent Laurier from ever becoming the villain the game demands. The central conflict arises from his dual mission: to alter the predetermined narrative of the otome game while navigating the complex social and political expectations of his position as a duke. The setting is a fantasy noble society typical of the genre, where social status, political maneuvering, and the events of the game's plot create constant challenges.

The main character is the former salaryman now living as Kalis Fall, a man armed with knowledge of the future he must use carefully. His wife, Sasha, and his daughter, Laurier, are the primary recipients of his devotion, and his efforts to earn their trust and happiness form the emotional heart of the story. As Laurier grows, she begins to interact with the key male characters from the game, known as capture targets. The narrative arcs focus on the father's proactive steps to dismantle the original story's tragic flags. This includes building a loving home, using his modern knowledge to solve problems in creative ways, such as making sweets and other goods, and subtly guiding the relationships his daughter forms to ensure they lead to a bright future rather than a downfall. The story follows his daily life as a devoted parent and husband, all while working in the background to rewrite his daughter's fate.