Natsume stumbles into a snow-woman who's forgotten what she's searching for, and he just quietly decides to help her look anyway. That's the entire premise, and it works because the show understands that sometimes the point isn't solving the mystery, it's walking alongside someone who's lost. The OVA doesn't reinvent the series; it just proves again that Natsume at his gentlest, standing in the snow with a forgotten youkai, is exactly where this story belongs.
Natsume stumbles across a snow-woman youkai during the season's first snowfall, wandering alone through the winter landscape. She's searching desperately for something precious, but her memory of what she's lost has faded into vague impressions. The problem is immediate and tangible: everything her frozen touch reaches crystallizes, making her search treacherous for anyone nearby. Despite the danger, Natsume chooses to help her retrace her steps and piece together fragments of her forgotten past. What unfolds is a quiet winter journey between human and spirit, where the melancholy of lost time and fading memories weighs as heavily as the snow around them. Natsume's genuine compassion for youkai, even those he barely knows, drives him to spend his day solving a mystery that matters only to her. The OVA captures the series' signature tone: supernatural elements grounded in genuine emotion, where helping others costs something real. It's intimate storytelling about connection, sacrifice, and the small kindnesses that define us, wrapped in the stillness of winter.