Civilizations are falling, worlds are dying. The people we once knew have either perished or become monsters. Warfires blaze across the earth. The last emperor guards a lonely city. Three billion and four hundred million dragons soar through the sky. Former comrades turn their swords on one another. The dead loathe the living. The ancients are awakening. The Seven Deadly Sins loom over the world. One song from Leviathan stirs the ceaseless turning of fate.
The last knight and the witch wander through three worlds. They cross the filth of their homeland and witness civilizations rise and fall. They board an ancient train that travels among the stars and through dreams, see the Phoenix dazzle the mortal world with its splendor, and watch countless stars fall. The dormant holy authority revives in their hands, and the vast sea of stars trembles beneath their feet.
They have crossed this sea of suffering through three worlds. Truthfully, they don't particularly want to save the world. But if they want to stay together forever, they have no choice but to try to save it all.
The gods do not love humanity. Only humanity loves humanity.
On Mount Sumeru, the Buddha holds up a flower and gazes down upon all living beings, sighing with compassion: The sea of suffering has no shore. Who can ferry us to the other side?
P.S. One heroine, no ambiguous relationships. Pure love, pure love, pure love. A vast, multi-layered world, with an ensemble cast. Slow burn. Original work, not fanfiction.