Breath Of Fire – Ryuu No Senshi

Long ago there was a huge war between dragons which almost destroyed the world. The war was stopped in time, but the dragons noticed the impact their power had on the planet, and thus the light dragons sealed it for the sake of the land.
Several centuries have passed. Now the dark dragons have risen!
With the help of a mysterious goddess, they have recovered their ancient powers and aim for world domination. But before that they destroy Dragnier, home of the light dragons. The whole village is engulfed in flames but the townspeople survives thanks to Sara, a dragon maiden who temporarily petrifies everyone in order to protect them from the blazing fire, and went alone to battle the army.
After the battle is over everyone recovers, only to see that their village is in ruins and Sara has dissapeared. Ryu, her young brother then decides to put an end to the dark dragons’ scheme and also look for his missing sister. Thus the journey that will forge a new dragon warrior begins…
From Baka-Updates:
In the years following a great civil war between the Light and Dark Dragon clans. The Light Dragons are dwindling, reduced to hiding in small villages. The protagonist is Ryu, a young Light Dragon who awakens one night to find his home set on fire by Dark Dragons. After his sister is captured in the attack, Ryu sets off to rescue her. In the process, he joins a race to uncover seven mystical keys, before the Dark Dragons can use them to unlock a goddess of destruction.