Ryuu Kokoro

Ryuu and his sister, Keiko, manage to escape a horrific incident. Soon after, both siblings live with the Sen couple who adopted them. After the sudden kidnapping of Keiko, Ryuu along with a wyvern named Pochi, set off for Keiko's rescue. However, while on his journey, Ryuu finds more about his real family, and himself. Will Ryuu be able to save Keiko from the Dark Lord and take the truth at the same time?