Long before Yokohama’s gifted walked the streets, the world was called Teyvat — a land shaped by gods, visions, and the elemental pulse of creation itself. But Teyvat fell, and its name vanished with time. The oceans swallowed sacred cities, legends turned to dust, and history began anew under another name: Earth. Only one soul remembers. Y/n, long ago known as Lumine, lives hidden in a mansion deep in the forests outside Yokohama, surrounded by echoes of a world no one else remembers. Beneath her home lies a vast, secret library preserving what remains of Teyvat — journals, manuals, half-faded cookbooks, and letters written in a language the world has long forgotten. Every word is a memorial to those she loved and lost — including her brother. Centuries later, she meets Kenji Miyazawa, a boy chasing after a cow who stumbles into her hidden garden — and quietly into her long-broken heart. He is the only one who knows of her existence, though he has no idea she once walked among gods. Now, as Abilities rise and the world begins to echo faintly with Teyvat’s lost powers, Y/n must decide whether to remain a ghost of the past or step once more into the story of humankind’s second chance.