In the world of Jujutsu Kaisen, humanity is haunted by its own heart. Cursed Energy (Juryoku) is not merely a power source; it is the sediment of our collective soul—grief, regret, shame, and fear. While the average person unknowingly leaks these toxic emotions like sweat, they do not vanish. Instead, they pool and ferment in the dark corners of society. In places stained by heavy memories—schools, hospitals, cemeteries—this invisible filth coalesces into Cursed Spirits (Jurei), sentient nightmares that hunt the very populace that birthed them. Standing between humanity and these invisible predators are the Jujutsu Sorcerers (Jutsushiki). Born with the burden of sight, these rare individuals are not merely vessels, but living dams. They contain the flow of negativity within their own bodies, refining it into the fuel for Cursed Techniques (Jutsushiki). Bound by a secretive hierarchy and a blood-soaked duty, they fight a war in the shadows. It is a cruel paradox: to save the world, sorcerers must weaponize the very negativity that corrupts it, protecting a society that endlessly breeds its own destruction.