Psycho no Sekai

She was brutally murdered, her body severed cleanly in two, yet the world moved on without a second glance. Her killer remained unidentified, and her tragic death faded into obscurity almost overnight. In a merciless society where the strong inevitably crush the weak beneath their feet, such injustices are treated as the natural order. No one sought answers, and no one demanded justice for a life so easily discarded. Twelve years later, her childhood friend, Mamoru Inubo, refuses to let her memory remain buried. Driven by an unwavering desire for retribution, he has spent over a decade meticulously devising a plan to hunt down the murderer the rest of the world chose to ignore. His ultimate goal is deeply personal: to drag this forgotten killer into the grave with his own bare hands. After years of patient preparation, Inubo finally secures the last crucial element his strategy required—a willing partner to stand beside him. Together, they step onto a long, harrowing path paved with vengeance. What follows is a gripping suspense narrative defined by relentless rebellion and the heavy cost of seeking justice in a world that offers none.