Centuries ago, Kanna was the last of her winged race and a princess, imprisoned in fear by the world within a castle. One day, she met Ryuuya, a soldier, and shared with him her dream of exploring the outside world in search of her mother, eventually falling in love with him. Despite Ryuuya's attempts to make her dreams a reality, Kanna was cursed with eternal pain and sealed in the sky. Many years later, Yukito, a descendant of Ryuuya, arrived in a quiet town hoping to earn some cash before their annual festival. It was here that he met Misuzu, an extraordinary girl who reminded him of his mother's words, urging him to use his power to release the reincarnation of Kanna. As Yukito and Misuzu grew closer, he discovered Misuzu's ties to Kanna's past, leaving him with the choice of leaving or helping to break the cursed torment that had plagued Kanna for centuries.