Ayame is a typical high school student. but she has something, that makes her different from any other girl on the same age.
She´s not interested on having a loving ralitionship.
Her life will take a different path, when she fosters a tiny kitten.
Which will become magically into a human, who answers to the name of Shiro.

But, for Shiro to break the spells which he´s placed under control, he´d get a truly Ayame´s love kiss, before the Winter.
Will Shiro be able to get it, or he´d be a cat again?