Looking at Miyuki and Tatsuya now, it might be hard to imagine them as anything other than loving siblings. But it wasn't always this way... Three years ago, Miyuki was always uncomfortable around her older brother. The rest of their family treated him no better than a lowly servant, even though he was the perfect Guardian, watching over Miyuki while she lived a normal middle school life. But what really bothered her was that he never showed any emotions or thoughts of his own.However, when danger comes calling during a fateful trip to Okinawa, their relationship as brother and sister will change forever...

"In 2092, Okinawa was suddenly invaded without warning by an unknown enemy force. Miyuki and her mother were caught up in the battle that ensued, leaving them in dire straits where they were all but helpless, relying on the help of a lone young man...named Tatsuya. This is the story of how the Shiba siblings got where they are now"--Provided by publisher.