Ryuu Tsukai wa Mada Sora wo Shiranai

Sana, a rider of Black Dragons, was preparing to cross the Skywall with her allies to confront the White Dragon. They were suddenly attacked and destroyed in a deadly blaze, causing Sana to lose all her companions. She was the sole survivor, but the event left her too traumatized to fly. Her inability to take to the skies ends when she encounters another individual.