Hiiro No Isu緋色の椅子; 绯色的椅子; The Scarlet Chair

From Dragon Voice Project: Setsu is a tomboy who lives in the small village Niolz and she's been participating in various Martial Arts Comepetitions in order to earn enough prize money to travel to the capital Bazen where King Lucaria resides... Luca, her childhood friend who left in order to ascend the "Scarlet chair" as the last rightful heir of the royal line. However when she finally arrives there and gets a glimpse of the King she's shocked to find a stranger in his place! What's going on? But more importantly what happened to the real Luca? Join Setsu in her quest to uncover the truth and find that precious childhood friend...