Kota works as a servant in a grand mansion nestled deep within the forest. Orphaned at a young age and left without a place to go, he was taken in by the kind master of the house and lived peacefully alongside the other residents—except for the strange changes happening to his body every day.

One day, he discovers a silver wolf caught in one of the mansion’s traps. Unable to ignore its plight, he risks everything to set it free. But that single act of kindness sets in motion a chain of events that will change his life forever.