The official website for the television anime adaptation of Tsubasa Yamaguchi's Blue Period manga revealed on Friday additional cast, staff members, and a second key visual (pictured). The anime is scheduled to premiere in October 2021.

Cast
Maru Mori: Mayu Aoyagi
Masako Saeki: Fumi Hirano (Urusei Yatsura)
Sumida: Masaya Fukunishi (Nomad: Megalo Box 2)
Koigakubo: Shinichirou Kamio (Hypnosis Mic: Division Rap Battle - Rhyme Anima)
Utashima: Tatsumaru Tachibana (The God of High School)
Umino: Miku Hiratsuka
Shirai: Ikumi Hasegawa (Jaku-Chara Tomozaki-kun)
Shirota: Yuuna Nemoto (Z/X: Code Reunion)
Yamamoto: Aoi Koga (Bokutachi no Remake)

Staff
Art Director: Ken Nakamura (Tenki no Ko background art), Yuuji Kaneko (Josee to Tora to Sakana-tachi)
Art Setting: Mamio Ogawa (Bakuten!!), Mika Nakajima (Dokyuu Hentai HxEros)
Director of Photography: Yasushi Hattori (Bermuda Triangle: Colorful Pastrale)
Color Design: Ritsuko Utagawa (Sore ga Seiyuu!)
3DCG Director: Yoshimi Arimasa (Tonikaku Kawaii)
Editing: Kazuhiko Seki (Arte)
Special Effects: Naoyuki Fukuda (Mushoku Tensei: Isekai Ittara Honki Dasu)
Music: Ippei Inoue
Music Producer: Kouhei Sakai (Mashiro no Oto)
Music Production: DMM Music
Sound Director: Hiromi Kikuta (Given)

Katsuya Asano (Yu☆Gi☆Oh! Vrains) helms the anime with chief director Koji Masunari (Magi: The Labyrinth of Magic) at Seven Arcs. Reiko Yoshida (Violet Evergarden) is handling the series composition and penning the script, and Tomoyuki Shitaya (Shokugeki no Souma) is designing the characters.

Yamaguchi began drawing the slice of life drama manga in Monthly Afternoon in June 2017. Kodansha shipped the tenth volume on May 21.

Kodansha USA licensed the manga in English in November 2019, and will publish the fourth volume on August 19.

Source: animate Times