The story follows a protagonist who, after dying from overwork as a studious salaryman in modern Japan, is reincarnated into a fantasy world of swords and magic as Allen Rovene, the third son of a viscount. Upon regaining his past life memories at age twelve, he harbors a deep resentment toward academic pressure and vows to live a carefree, wind‑blown existence as an adventurer. However, he soon discovers that this new world operates under a rigid academic society where credentials, entrance exams, and magical proficiency are inextricably linked, making it impossible to succeed without navigating the very system he despises.

To pursue his dream of becoming a magic‑wielding adventurer, Allen is forced to enroll in the Royal Knight and Mage Academy of Yugria, a prestigious institution that gates magical potential and social advancement behind scholastic achievement. Despite his aversion to studying, his past life as a diligent scholar proves unexpectedly useful, allowing him to excel in the entrance examinations and practical tests. His unprecedented performance, however, draws immediate suspicion from both faculty and noble students, who accuse him of cheating and place him under probationary scrutiny.

Allen’s magical aptitude is highly unconventional. While he lacks talent for traditional offensive magic, he discovers a natural gift for body‑strengthening magic, which aligns more with physical combat than intellectual spellcasting. This leads to a recurring comedic tension between his self‑image as a refined sage and his peers’ perception of him as a muscle‑headed brawler. Through the academy, he becomes involved in extracurricular quests, monster hunting expeditions, and guild activities, where his improvised strategies—blending rote memorization from his past life with instinctive combat—prove unexpectedly effective but also draw further unwanted attention from authorities and rival noble factions.

As the narrative progresses, Allen balances his duties as a student with his growing reputation as an adventurer. He moves into a dilapidated dormitory that becomes an unlikely hub for his admirers, joins the Explorers Guild where his casual demeanor is misinterpreted as intimidating confidence, and participates in academy events such as training camps that transform into grueling military exercises. Later volumes expand the scope to include inter‑class tournaments, academy festivals, and political intrigues involving his family estate, all while Allen struggles to maintain his carefree ideals against the escalating expectations placed upon him.

Key supporting characters include his family members, notably his mother and sister, as well as classmates and instructors who either idolize or resent him. The world itself blends medieval fantasy elements with modern institutional trappings such as entrance examinations, grade rankings, and credentialism, creating a satirical backdrop where even a reincarnated protagonist cannot escape the pressures of academic competition.