The sequence spins around a high school boy named Ryuuji, who efforts to saving a girl from black-market traders, only to find that she is, in fact, a dragon. The opening theme of the anime is "Immoralist" by Yui Horie.
Kisaragi Ryuuji's life has been cleared up into a dining hall when his cousin Nanao Eriko went back and was conducting a definite treasure which they called a 'Lost Precious' but rather of discovery a treasure inside a suitcase. They found a girl. The young girl gladly secures on to Ryuuji even though they have never met. Who is this little girl? It thus starts the romance story of the beautiful young Rose and Ryuuji.
