Ernesto, genetically engineered by Dr. Kiriko to possess heightened intellect and physical prowess, emerges from a clandestine laboratory where his existence is marked by relentless experimentation and isolation. His sole connection to warmth comes through a younger sister, another of Kiriko’s creations, whose presence forges an unbreakable bond amid sterile confinement.

When genetic instability claims his sister’s life, Ernesto flees the facility, consumed by rage and grief. Adrift in solitude, he grapples with existential voids and an obsessive need to decipher human emotions. Chance encounters with wandering medics provide unsanctioned training in anatomy and surgery, awakening an unexpected aptitude for healing despite lacking formal education.

Years later, Ernesto confronts Kiriko, now a despotic ruler weaponizing genetic science to engineer obedient soldiers. Their reunion reveals plans to replace Ernesto with a more compliant successor. Torn between vengeance and preserving his sister’s memory, he sabotages the laboratory, destroying Kiriko’s research and inadvertently causing the doctor’s death.

His journey mirrors struggles with identity, autonomy, and scientific ethics. Once driven by defiance, Ernesto shifts to protecting others from similar fates as his own body deteriorates from inherited genetic flaws. This terminal decline fuels a race to impart medical knowledge to marginalized communities.

Interactions expose a moral duality—cynicism toward humanity’s cruelty tempered by empathy for individual suffering. In his final days, he tends to a disease-ravaged village, prioritizing palliative care over seeking a personal cure. His unseen death hints at fragile peace achieved after a lifetime of turmoil, leaving behind ripples of quiet impact over dramatic legacy.