A lonely man falls in love with an oni. The film stretches that single premise into something quiet and achingly real, refusing to treat the supernatural as a shortcut to meaning. What matters is how two creatures who don't belong anywhere decide to stay anyway.
A lone oni wanders through autumn mountains, carrying centuries of solitude in her bones. When a human musician stumbles into her territory, drawn by an inexplicable melody only he can hear, something shifts in the weight she has carried alone. Their connection defies the natural order that keeps their worlds apart, built on stolen moments of shared music and unspoken longing. As seasons turn, the oni confronts what it means to want something she cannot keep. The musician, bound to the human world, faces an impossible choice between the life he knows and the pull of something transcendent. Neither can cross the threshold that separates them without losing everything that makes them who they are. Rendered with intimate hand-drawn animation, the film moves at the pace of a folk ballad, letting silence speak as loudly as the music that binds its two souls together. This is a quiet meditation on sacrifice and connection, where the most profound love stories are the ones never fully told, existing in the spaces between worlds and the gaps between heartbeats.