My Sister Is Dead, What Does the Survival of This World Have to Do with Me?

Is it an illusion? Or reality? The Dream Eye Project was implemented on January 1, 3030 in the Purple Star Calendar. Terminate the experiment immediately on April 4, 3030! In the smoke-filled city, a crack appeared in the sky, and huge tentacles protruded from the crack. In an instant, demons danced wildly, and the two worlds merged. Human beings fought bloody battles, and the mountains and rivers were stained with blood in a blink of an eye, and all lives were devastated.