Ephemerae: a story about soul traveller

Best friends usually say 'good morning' once they meet on the street. 'Good morning, Cal.' That's how it should be. But it was all different with Caleb. "Good morning, Cal." I doubted he remembered himself as a Caleb. Instead, all I could say every the morning was 'Who are you today?' Caleb Donahue is never an ordinary guy. He is a time traveler, traveling from one soul to another, as he takes a journey into different era everyday. Amethyst Mist, Caleb's best friend, has never felt more lost. Together, they go through various adventures. But the more they discover new time to settle in, the less they know themselves.