If you're looking for manga similar to Genkai Tokki: Moero Chronicle - Bonnou wa Osananajimi no Tame ni... (Light Novel), you might like these titles.
To oppose the gods or yield to fate? That is the question confronting each of the characters in The Dawn of the Future. Ardyn, having saved countless lives from the Starscourge, means to become the Founder King of Lucis and instead is cast into tragic exile. On the day the Empire falls, as the imperial capital collapses around them, Commodore Aranea is entrusted with the life of a singular young girl. The Oracle Lunafreya, upon awakening from the slumber of death, discovers that her body has undergone an extraordinary transformation. And after gazing upon the eternal, Noctis, the True King, finally comes to terms with his destiny. Herein lie the stories of the dawning of a new world in Final Fantasy XV.
Near the "end of the world" lies Remnant Island, one of the islets in the vast Sciencia Seas. Two boys who just returned from their vacation, Nayuta and Signa encountered a small fairy-like girl called Noi from the descended ruins tower nearby. Furthermore, two men named Zechst and Selam appeared before them after Noi's Master Gear, whose powers can control the stars. The Master Gear, the ruins that fell from the skies and the other world "Lost Heaven" within the Star Fragments. To protect the future of the stars, Nayuta Herschel journeys off to the other land "Terra".