The story begins with the protagonist, a young man burdened by his family's prestigious lineage and his own perceived lack of talent, contemplating suicide from a tall building. His life has been a series of disappointments: failing to live up to the expectations of his influential family, being abandoned by his parents, marrying a woman who then eloped, and losing his child. He feels trapped by his family name, which he both despises and clings to as his only source of identity. In his despair, he jumps.
He experiences a vivid flashback detailing his life as the eldest son of a prominent family, raised with wealth and privilege but lacking any exceptional abilities. His political aspirations ended in failure, leading to his parents' disownment. He reflects on his internal conflict: a deep-seated belief in the superiority of noble blood versus the realization that in his era, ability reigns supreme. He questions why he, with his noble birth, suffers while those of lower status seem to thrive.
His consciousness then shifts. He finds himself in a new body, as a newborn baby, hearing the voices of unfamiliar people celebrating the birth of a son. He learns he is Louis de Bourbon, the first son of a Duke. He realizes he has been reincarnated into the world of a light novel he read just before his death. This novel featured a female protagonist who, despite being born into a powerless baron's family and lacking magic, rose to prominence through her talent in spirit arts. Louis, however, found the novel's portrayal of nobles disregarding social status and the protagonist's effortless victories frustrating, identifying with the "villainous nobles" who were ultimately defeated.
Now, as Louis de Bourbon, he finds himself in the role of a villainous noble from that very novel. He is the heir to a powerful ducal family in the Francida Empire, a world with magic, various races, and a history spanning centuries. Despite his initial shock, Louis embraces his new life, seeing it as a chance to rectify his past regrets and prove the supremacy of noble blood. He dedicates himself to studying geography, history, and the world's magic system, determined not to be perceived as incompetent.
At the age of five, Louis diligently studies, driven by his past failures. He learns about the three continents, diverse races, and the existence of magic, which is cast through incantations and the manipulation of ambient magical energy. He resides in the opulent Bourbon ducal estate in the Arkya region, a prosperous area. He enjoys a seemingly warm family life with his young parents, Ranold and Yohana de Bourbon, though his father is depicted as a womanizer and his mother as strong-willed. Louis expresses his desire to learn magic, and after some hesitation from his mother due to the inherent dangers, he is permitted to begin his training.
The next day, Louis begins his magical education with his father. He quickly grasps the fundamentals of magic, demonstrating an innate talent that surprises his father. He successfully casts a wind spell, "Gast Wind," astonishingly well for his age. This success fuels his belief in his own chosen destiny and the superiority of his bloodline.
Two years later, at the age of seven, Louis has advanced significantly in his magical studies, mastering spells up to the "Advanced" rank, far surpassing his peers. He attributes this to his noble blood and diligent effort, believing that his talent, combined with hard work, will allow him to overcome the novel's protagonists. He is preparing for his first "demon-slaying ritual," a rite of passage where he must defeat a monster. His target is a "Large Slime," a low-ranked monster, which he easily dispatches with a combination of wind magic and his sword, earning praise from his father. He also obtains a "core," a valuable item left behind by defeated monsters.
The day after his birthday, Louis's father brings home Ars, his illegitimate son from a past affair. Ars, a timid and younger boy, is immediately met with disdain from Louis's mother, Yohana, who views him as "filthy." Louis, recognizing Ars from the novel as a potential rival and a key figure in his eventual downfall, is initially conflicted. However, witnessing Ars being bullied by maids, Louis intervenes, expelling the maids and declaring Ars his subordinate. He rationalizes this by stating that while Ars's mother was a commoner, Ars himself is of noble blood and will serve Louis's interests. Ars, grateful for being saved, pledges his loyalty to Louis.
A year later, Louis, now eight, has Ars as his loyal attendant and bodyguard, though he remains wary of potential betrayal. Louis continues his rigorous magic training, aiming to prove the superiority of his lineage. He plans to visit a dungeon with Ars to acquire powerful artifacts mentioned in the novel: a sword that doubles attack power and a pendant that doubles magic power. His father forbids them from going due to the ongoing war with the Dorth Kingdom and the danger involved. Undeterred, Louis uses a hidden passage to sneak out with Ars, heading towards a nearby dungeon.
They enter a low-level dungeon, where they encounter and defeat three goblins using a combination of magic and swordsmanship. Louis's tactical use of magic and Ars's growing combat skills are evident. They then discover a hidden dungeon entrance, a secret passage that Louis found through his knowledge of the novel. Inside, they face a powerful Ogre, a high-level monster. Despite Ars's fear, Louis, fueled by his belief in his noble destiny, prepares to confront the Ogre with a powerful wind spell.
