Koala's Diary

Koala's Diary is a Japanese manga series written and illustrated by Yuami. Originally serialized as a web manga on Twitter since June 2021, it was later acquired by Kadokawa Corporation, who then began publishing the series in print in March 2022. Four tankōbon volumes have been released as of February 2025. An original net animation adaptation produced by Studio Mother began releasing on YouTube in October 2025.

Characters

;Koala
;Crow-san
;Emu-san
;Hedgehog-san

Media

Anime

An original net animation adaptation was announced on June 11, 2025. The series is animated by Studio Mother and directed by Takao Kato, with Chiharu Hara designing the characters and Atsushi Umebori and Slavomir Stanislaw Kowalewski composing the music. It began releasing on YouTube on October 2, 2025. The anime's theme song "Niji to" performed by Punipuni Denki featuring Kan Sano.