Natsume's Book of Friends volume 12 features story and art by Yuki Midorikawa.

Natsume meets a kindhearted yokai who has found a ruined letter he desperately needs to read. There is another yokai who has power over paper who might be able to help him. But this yokai's name is sealed in the Book of Friends... Will it be willing to help the grandson of the woman who bound it?!