Arifureta - Special 01

"Yue's Diary" (ユエの日記帳) is the first OVA of the anime adaptation. It was released on December 25, 2019, and was included in the Blu-ray BOX ② set of season one.

Summary
Hajime and his friends stop by a hot spring to heal from the tiredness of their trip. The girls change at the dressing room, but Yue is nowhere to be seen. Shea and Kaori attempt to look for her, but Tio discovers a book labelled "Yue's Diary" in her clothes basket. Despite knowing that reading it is a violation of Yue's privacy, they let their curiosity get the better of them and begin reading her diary. Yue's journey and her thoughts are spelled out there--But Yue later took revenge on them for reading her dairy by blowing them outside of the room (with the only exception of Myu).

Characters

 * Yue
 * Shea Haulia
 * Tio Klarus
 * Kaori Shirasaki
 * Myu
 * Hajime Nagumo (flashback)
 * Cam Haulia (flashback)
 * Mona Haulia (flashback)
 * Aiko Hatayama (flashback)
 * Miledi Reisen (picture)

Types of Monsters

 * Diheadoar (flashback)

Differences

 * In the LN, Shea and Tio are the only ones that read Yue's diary. While in the Anime, Kaori and Myu read it as well.
 * In the LN, they read it at Myu's home after reuniting her with her mother. While in the Anime, they read it while they are at an inn.