The Fandom Post is reporting that Tubi TV has added the Yamibo: Darkness, The Hat, And Travelers Of The Books anime series to its service.
The story of the series is described as:
Hatsuki is a high school 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.
Yamibo: Darkness, The Hat, And Travelers Of The Books originally aired on Japanese television from October 2-December 25, 2003.
Source: The Fandom Post