The official website of Asobi Asobase announced cast and staff members for the series on Monday. The anime will air in Summer 2018.

Cast
Hanako Honda: Hina Kino (Toji no Miko)
Olivia: Rika Nagae (Frame Arms Girl)
Kasumi Nomura: Konomi Kohara (Tsuki ga Kirei)

Staff
Director: Seiji Kishi (Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e (TV))
Assistant Director: Yuu Kinome (Gakkougurashi! episode director)
Series Composition: Yuuko Kakihara (Orange)
Character Design: Keiko Kurosawa (Konohana Kitan)
Background Art: Kusanagi (Hakumei to Mikochi)
Editing: Morita Editing Room
Sound Director: Satoki Iida (Fate/kaleid liner Prisma☆Illya)
Music: Masato Kouda (Kono Subarashii Sekai ni Shukufuku wo!)
Animation Producer: Yuuji Higa (Kuzu no Honkai)
Studio: Lerche

A stage event for the anime will be held at AnimeJapan 2018 on March 24, where the main three cast members will appear for a talk show.

Source: Moca News