Dokugan Densetsu no Saikoo

In a world where humans and oni coexist under ancient and incomprehensible laws, a young man known as Leborgne lives unaware that his very existence defies the natural order. When he discovers a strange power dormant within him—one tied to a forgotten language and emotions he does not yet understand—his life begins to unravel. Each encounter draws him closer to an unsettling truth: time is not immutable, and some scars of the past refuse to fade. Accompanied by an unpredictable oni, allies burdened with heavy secrets, and a brother whose gaze seems to carry the end of the world, Leborgne finds himself at the center of a conflict that reaches beyond the present. Because in this universe, altering time leaves a mark. And some marks become abyssal. Between memory, mistrust, and forbidden attachment, he must discover who he truly is… before reality itself decides for him.