The official website for Nana Maru San Batsu has announced additional cast members. It has been previously announced that announcer Taichi Masu will also narrate mini anime part "High School Quiz" after main anime part. The anime will air on Wednesdays at 1:59 a.m. via Nihon TV, followed by Family Gekijou starting July 5. The anime will also be available for streaming on online services such as Hulu, Nihon TV On Demand, and d-Anime store.

Cast
Yousuke Ashiya: Wataru Hatano (Hamatora The Animation)
Takumi Niina: Tatsuhisa Suzuki (Free!)
Kinimitsu Ookura: Tomoaki Maeno (Starmyu)
Yuki Kouzuki: M.A.O (Mao Ichimichi) (Hinako Note)
Akira Sonohara: Ayane Sakura (Boku no Hero Academia)

A 3-episode special show for the male cast members to challenge competitive quizzes will start on June 28 via its official website.

Source: Moca News