From Yen Press:
Luciole can’t remember his life before waking up and doesn’t recognize the world he awoke to. How long was he asleep? Was it fifty years? One hundred? One thousand? The only certainty is a world devoid of people except Claude, the five-hundred-year-old magician who saved him. Claude is prone to grumpiness and sleeping whenever the chance presents itself, but he’s all Luciole has in this lonely place. Together, they set off on a journey through the ruins of a land long forgotten, searching for any sign of life in the eerie quiet that remains.