Kita no Toride nite

A Japanese girl was reincarnated as Mir, the cub of a snow-fox spirit. With memories of her past life, Mir lived peacefully with her mother in the snowy mountains. One day, Mir was asked to stay at home while her mother went away. Unable to bear the loneliness, Mir ventured out on her own. Hiding from people with her animal instincts, she made her way to a fortress, where she was discovered by a one-eyed knight with a scar on his face...?

(Source: Futabasha, translated)