

Originally launched on PC (Windows) with the same name as an adult-oriented visual novel, the game was later adapted for consoles with all adult content removed, while new CG scenes and story segments were added to balance out the omitted material. The story centers on Makoto Okano, who returns to his hometown after a decade away. Before he left, he and Minamo Narukaze had promised to reunite. She vowed to continue playing the harmonica, and though he might be too distant to hear it, she hoped the wind would carry the tune all the way to him.
That summer day. Makoto Okano and his younger sister Hinata face each other in the compartment of a regional express train bound for that town, beneath a sky so blue it seems endless. The destination is the very place where they were born and long since left behind—Kazune City. As the midsummer breeze flows in through the open window, carrying the scent of the season, they travel toward a town they remember only in fragments. "Hey, let's promise to meet again." "I'll keep playing this harmonica, okay? Because even if I can't reach you, the sound of the harmonica will." The harmonica, passed to him along with that promise from the girl. And in the swaying cabin of the train, Makoto slowly, yet clearly, awakens that memory...
| Saturn | January 30, 2003 |
| DC | January 30, 2003 |
| PS2 | December 18, 2003 |