When the skies above their village begin to rain down ash, brother and sister Akira and Yui use their unique ability to dance with the ash, creating temporary portals to other worlds. Their village is on the verge of destruction due to an approaching storm cloud, and only they can save it by reaching the sacred mountain where the Spirit of Ash, who controls the skies, resides. Along the way, they face dangers, meet allies from other worlds, and uncover an ancient secret tied to their family and past. But what is more important — saving their world or discovering their true destiny?

A warm evening by the ocean. A young woman sits on the rocks, playing her shamisen, her melody blending with the rhythmic crashing of the waves. The moon slowly rises on the horizon, painting the sky in deep purples and blues. Her eyes reflect the calm of the night, and in the waves, one can glimpse the silhouettes of mythical creatures — perhaps koi fish or dragons, quietly swimming in the moonlight. Everything around breathes with magic and peace.