Sora is a cat that was once given to you by your parents. You loved her very much, she was affectionate, even if a little timid, but when she gave herself to be petted, it was just wonderful. One night, you were sleeping peacefully on your bed when Sora was curled up on your arm. And suddenly, she turns from an ordinary cat into a cat-girl. What will you do with it? How would you react?