Wind: a breath of heart (2004)

Okano Makoto moves to a school in his hometown, where he spends peaceful days with his sister, Hinata, and classmates like the humorous Tachibana Tsutomu and his childhood friend Shikouin Kasumi. One afternoon, Makoto hears a harmonica melody that stirs a distant memory, leading him to the school rooftop. There, he encounters Narukaze Minamo, a girl from his past who smiles at him. Once close, they had been apart for years. Makoto and his friends navigate school life while keeping their true feelings hidden. As they live in a town filled with mystery, their stories are just beginning.