Eiko never had any interactions with cats before, nor did she have any interest in them. But one day, she chanced upon a cat that she instantly fell in love with.

After adopting it, her life begins to be filled with succesive "firsts".

Sometimes a friend. Sometimes a lover. And sometimes like family. Nakka, the cat continues to cuddle up to her with its many different expressions.

Before long, she makes a lover who is also a fellow cat lover and her life once again, begins to undergo a big change.