The protagonist awakens as a baby, Leo, in a world devoid of modern technology and filled with unfamiliar language and medieval-esque attire. He deduces he has been reincarnated, retaining only fragmented memories of a divine entity bestowing him with special abilities and limited past-life knowledge. His new family consists of a handsome father, a beautiful mother, and an equally stunning older sister named Helena.
Six months later, Leo can understand the local language. He learns his father's name is unknown, but his sister is Helena. He discovers magic exists when a maid's touch heals him. Two months later, Leo masters crawling and begins exploring his large home, seeking books, especially those on magic. He finds a study but cannot read the language. He enlists a maid to read to him, discovering a magic book. Over a month, he comprehends the book's explanation of magic: it uses internal mana, but requires sufficient mana quantity and specific elemental affinities. Most people lack the former, and many lack the latter. Leo learns about six basic elements, neutral, and unique affinities, with neutral being common but difficult to master for self-enhancement. He resolves to train his mana.
Leo discovers a small lump in his lower abdomen which he hypothesizes is his mana. Through sheer willpower, he manages to move it slightly, discovering a method to train his mana. He dedicates himself to this practice, and after several weeks, his mana grows and its range expands. Three months later, he can move mana throughout his body, and its quantity increases significantly. He continues training, noticing his mana's color and concentration deepening, and its movement speed increasing, which he believes is crucial for casting spells quickly.
On his first birthday, Leo learns his full name is Leons Foster. He has two older brothers, Ivan (8) and Alex (7), and his parents are Diorc (28) and Carla (25). His older brothers have red hair, while he and Alex have black hair, a rare trait. The family celebrates his birthday, and his brothers express interest in teaching him swordsmanship and magic, respectively. His mother worries about his aptitude for magic, hinting at social stratification based on magical talent.
Four years later, at age five, Leo has spent his time training mana and reading. He begins asking questions about the world, his family, and the Foster lineage. He learns about the three major human nations: the Alva Kingdom, the Vector Empire (a magic-focused nation where he lives), and the Garm Holy Kingdom. He also learns of monsters, demon lords, elves, and beastmen. The Foster family's lineage traces back to a hero who defeated a demon lord, becoming a marquis and receiving land bordering the "Demon Forest." His grandfather, the hero, is now a Duke living in the capital.
Leo embarks on a week-long carriage journey with his parents to the capital to have his aptitude for magic tested at a church. He learns about status cards, which reveal strength, affinity, and sometimes titles. His father, Diorc, is a Level 56 Swordsman with high mana and fire and neutral affinities. His mother, Carla, is a Level 36 noble with ice affinity and high luck. Leo's status card reveals him as a Level 1 Creator with immense mana and luck, and neutral and creation affinities. His parents are concerned about his creation magic, believing it to be weak, though his immense mana and luck surprise them.
In the capital, Leo meets his grandfather, Kent, a former hero, and grandmother, Karina, a former Archmage. He learns his grandmother possesses incredibly high mana and multiple magic affinities. His grandfather, impressed by Leo's mana, vows to train him in neutral magic to become a powerful swordsman. His older sister, Helena, arrives and reveals her lightning, water, and wind affinities.
Leo experiments with his creation magic, initially failing to create a simple ping pong ball, draining his mana. He discovers that using materials significantly reduces mana cost and improves success. He successfully creates chopsticks from a branch and a fork from a metal cup, though the latter drains him severely. He learns that creation magic requires mana and materials, and its efficiency increases with level. He also discovers that using mana, even to the point of exhaustion, increases his mana capacity. He creates a "Growth Bracelet" from his father's silk handkerchief and a magic stone, which doubles his status growth.
Leo's mana rapidly increases, reaching over 10,000 by age five, and he gains the title "Archmage." He learns about magic stones, which can be infused with mana and sold. He infuses a magic stone to its limit, creating a powerful "Necklace of Love" that significantly boosts mana growth and grants immunity to all status ailments except love.
The Emperor visits Leo's family, accompanied by his daughter, Princess Sheria. Leo is tasked with entertaining her. He learns the Emperor is a frequent visitor due to his fondness for the family's unique cuisine, which originates from the hero's homeland. Leo uses his creation magic to craft a necklace for Sheria as a gift, which she wears, unknowingly boosting her mana growth. Leo teaches Sheria how to infuse magic stones with mana, and she quickly masters it, demonstrating rapid mana growth, likely aided by the necklace. The Emperor and his family depart, with Sheria and Leo promising to meet again.
