"I woke up with nothing but fragments of memories from my life up to now. There was a man standing by my bed, who introduced himself as my lover. But one of my few recollections is of being left for dead in a...

The year is 2013, and it's the city of No. 6: a stringently controlled, diligently maintained megalopolis that embodies the highest ideals of humankind. Shion has lived under close supervision as a "high...