As the series became more popular, a compilation called Shiroi Yami no Hate de (しろいやみのはてで, At the End of White Darkness) was released in 2004 and a movie adaptation was produced.

Soon after, Kimura wrote the seventh and last book, Mangetsu no Yoru ni (まんげつのよるに, One Full Moon Night).

Mei and Gabu, no longer wanting to be bound by their respective clan's unjust regulations and hoping to preserve their friendship, cross a river during a storm.

Gabu hears his pack approaching and leaves Mei to face them, ready to defend his goat friend to the death.

In the end, Mei and Gabu both enjoy watching the moon as it rises, marveling at its beauty and swearing that their friendship will last forever no matter what.

In 2007, Yoshikazu Yokoyama directed the Engekishūdan Studio Life musical version, in which Sayaka Yoshino portrayed Mei.

The film Arashi no Yoru Ni, directed by Gisaburō Sugii and animated by Group TAC, was released in Japan on December 10, 2005.

[2] A small group of voice actors and sound engineers acquired permission from the original producers Tokyo Broadcasting System Television (TBS) to make a complete English dub of the Arashi no Yoru Ni movie for YouTube.

The ending was replaced with the song "Watch the Moon Rise" written and performed by Tustin Gilmer Macafee under the name MFE.

The vast majority of the voice acting is also done by Tustin Gilmer Macafee, with him and the rest of the cast being under pseudonyms for privacy reasons.

Other cast (English dub): Jarett Mauss, Luis Dirk Vardaman, Tustin Gilmer Macafee, Shanaa Moreau Staff Sound Theater: Arashi no Yoru ni was released on December 22, 2006.

A CG-animated television series, Arashi no Yoru Ni: Himitsu no Tomodachi (あらしのよるに ひみつのともだち, One Stormy Night: Secret Friends), has been produced by Sparky Animation in co-operation with Duckbill Entertainment, Baku Enterprise and Bandai Visual and began airing in Japan on TV Tokyo from April 4, 2012 with both Japanese and English audio tracks.