A love story that moves across centuries, cursed to repeat itself until two people break the cycle. The film abandons the TV series entirely and commits fully to Yukito and Misuzu's romance, letting their connection carry the weight of Kanna's ancient suffering. Animation flickers and character designs divide people, but the ending doesn't apologize for what it costs, it simply shows you a girl finally allowed to dream, and a boy who spent his entire life unknowingly trying to save her.
A wanderer named Yukito arrives in a sleepy coastal town a week before its yearly festival, hoping to earn some money. There he meets Misuzu, an unusual girl who brings back something his mother once told him: if he ever finds the reborn form of the winged girl, he must use his power to free her. Centuries earlier, Kanna, a princess and the last of a winged people, was kept locked in a castle because the world feared her. She fell in love with Ryuuya, a soldier and Yukito's ancestor, who tried to grant her wish to see the world beyond its walls and find her mother. He failed, and she was sealed away in the sky by magic, bound to suffer forever. As Yukito and Misuzu grow fond of each other, he learns how she is tied to that old story and must decide whether to walk away or try to lift the curse. Adapted from the adventure game Air, the film blends romance and supernatural drama.