Wind: a breath of heart (2004)

Makoto Okano returns to his hometown and resumes his normal life at school, surrounded by friends, including his sister Hinata, classmate Tsutomu Tachibana, and Tsutomu's childhood friend Kasumi Shikouin. One day, the enchanting sound of a harmonica draws Makoto to the school rooftop, where he encounters a girl named Minamo Narukaze, a childhood friend he had lost touch with over the years. As Makoto and his friends navigate their daily lives, they conceal their true feelings, and the town's mystique begins to unravel, setting the stage for a series of poignant and mysterious events.