Leon Fou Bartfort, a Japanese office worker fatally reincarnated into an otome game he once begrudgingly played, awakens as the third son of a minor rural noble family in Holfort Kingdom. Retaining memories of his past life from age five, his pragmatic and cynical worldview hardens within the game’s matriarchal society, where systemic exploitation of men fuels his disdain for nobility and class hierarchies. Determined to carve autonomy, he weaponizes meta-knowledge of the game’s events and secures ancient AI Luxion, whose advanced technology—a warship, surveillance networks, and strategic intellect—becomes pivotal in thwarting sky pirates, the Principality of Fanoss, and political adversaries.

Striving to remain an anonymous "mob" character, Leon’s resolve fractures as he intervenes to shield others from the game’s destructive plotlines. His sardonic wit and tactical ingenuity mask a fierce aversion to injustice, driving him to manipulate situations through blunt honesty and reverse psychology, such as inciting classmates’ pride to rally against invaders. Though outwardly self-serving, he guards loyalty to Angelica Redgrave and Olivia, aiding their navigation of the story’s turmoil. Protective instincts extend to his younger brother Colin and reincarnated sister Marie, their dynamic oscillating between rivalry and uneasy collaboration amid clashes over power and artifacts.

Beneath his strategic ruthlessness, Leon grapples with trauma from battlefield losses and moral clashes with Luxion’s utilitarian logic, particularly over prisoner treatment and non-lethal tactics. Forced into leadership, he ascends from low-ranked noble to duke and eventual king, leveraging military innovation and alliances to stabilize the kingdom. His disruption of the otome narrative culminates in engagements to Olivia, the prophesied Saint requiring three artifacts, and Angelica, whose redemption he orchestrates.

The Marie Route diverges as Leon prioritizes his sister’s safety, forming a political faction to counter spectral threats and societal machinations. Marrying Marie through calculated gambits, this path underscores cunning over brute force, reshaping his legacy into one of adaptive governance. Key bonds include Luxion’s Old Human-derived loyalty, Angelica’s intertwined fate, and Marie’s volatile kinship, blending shared reincarnation with mutual manipulation.

Leon’s legacy intertwines reluctant heroism with military and political upheaval, dismantling the oppressive structures he despised. His journey—a tightrope between craving peace and bearing leadership’s burdens—leaves indelible marks on Holfort’s societal fabric, balancing personal yearning for anonymity with the inexorable pull of transformative influence.