The Fall of Aspien (a novella)

"Never had I dared thought someday I would break one of these promises. Never had I once thought to betray Zeus's trust"

When Aspien came to earth, he was given a mission to fulfill with the Zodiacs. Except his encounter with Lucillia Earnheart, an earthling girl, has totally changed his fate forever. Now that he learned he's broken one of his promises to Zeus, he realized he had to make a choice: to choose his Lucillia or abandon his position as the Celestial's Gatekeeper, along with his mission that would change the place they live in.