I buried this feeling deep in my heart, but you brought it out.
What do you mean?
------Natsume
She has light brown hair, brown eyes, fair skin, and a smile as bright as the sun, but she hides an unknown secret in her heart. Others may see you happy, but in fact happiness is just your mask. This is Natsume.
I, Mr. Cat, not only want to protect the Friends' Book of Friends, I also want to protect your smile.