YAMIBO: Darkness, the Hat, and Travelers of the Books is a tV series anime that premiered in fall 2003, produced by Studio DEEN.

About the production: the story comes from a visual novel, there are 13 episodes of about 24 minutes and its current status is "finished".

Its main genres are adventure, ecchi, fantasy and mystery, with themes such as Female Protagonist, Primarily Female Cast, Yuri and Magic.

On AniList, YAMIBO: Darkness, the Hat, and Travelers of the Books has an average score of 59%, an average score, and appears on 7,338 users' lists.

Hatsuki is a highschool student living with her sister, Hatsumi, who she has a huge crush on. On Hatsumi's 16th birthday, she is suddenly surrounded by a green light and disappears in front of Hatsuki. She manages to follow Hatsumi with the help of a being resembling a fat baby chick (literally), ending up in a place called "The Great Library", which is full of different worlds stored in books. Hatsumi wasn't there, though, so the search for Hatsuki's great love begins and involves traveling from book to book.

Official synopsis from AniList.