- English: Yamibo: Darkness, The Hat and the Travelers of the Books
- Synonyms: Yami to Boushi to Hon no Tabibito, YamiBou, Traveller of Darkness, Hat and Book Traveler, Traveller Yami, Hat and Book
- Japanese: ヤミと帽子と本の旅人
Hazuki is a high-school student living with Hatsumi, and the two are so close they are like sisters. When Hatsumi disappears, Hazuki moves heaven and earth to find her, entering strange exotic worlds.