Past

Guest, the Guardian of the Mist Forest, found a nameless child who had been abandoned and was living alone. Guest took her in, fed her, gave her the name Shirayuki Rin, and lived with her as master and disciple. One day, Guest went out to gather food and met a cold death, murdered by someone. In the year Rin turned 15, she became the sole Guardian and protected the forest alone.

Present

Now 20 years old, she continues her training and duties as the Guardian without fail, wearing the crimson scarf that was her master's memento. One day, while guarding the forest alone, she sees a familiar silhouette and smells a familiar scent in the mist. It is undoubtedly Guest. The person who was clearly murdered five years ago has returned.