Wind: A Breath of Heart

After ten years, Makoto Okano comes back to his home town with his little sister Hinata. There, he again meets his childhood sweetheart Minamo Narukaze whom he has given a harmonica (owns by his father) as a gift years ago. A strange girl suddenly shows up, making Makoto realize something is going on. The girl is attached to his parents, Minamo's father Akihito and the harmonica itself.