A leak confirmed that the anime adaptation of the yuri genre novels written by Iori Miyazawa, Urasekai Picnic, will have a total of twelve episodes. The project does not have a release date yet.
Hayakawa Publishing published the first volume of this series in February 2017, with illustrations by Shirakaba. The fourth volume was published in December.
Eita Mizuno has been publishing a manga adaptation of the work since February 2018 in Square Enix magazine Shonen Gangan. The publisher published the third compilation volume in August 2019.
Source: @Spytrue
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