The official website for previously announced Whistle! (ONA) has been updated to announce the new cast members for the ONA series. The ONA series will start streaming on December 17 via Anime Houdai, UNEXT, dAnime Store, dTV, and Geo Channel services.

Cast
Yuki Kojima: Yui Makino (Shounen Maid)
Masato Takai: Shintarou Oohata (Beck)
Yoshihiko Koga: Seiichirou Yamashita (Orange)
Hideomi Hanazawa: Shunichi Maki (All Out!!)
Hiroyoshi Noro: Rie Kugimiya (Fullmetal Alchemist: Brotherhood)
Yuusuke Morinaga: Koutarou Nishiyama (Kiznaiver)
Mamoru Tanaka: Kengo Kawanishi (3-gatsu no Lion)
Santa Yamaguchi: Yuuko Sanpei (Kimi ni Todoke)
Miyuki Sakurai: Ayaka Nanase (Servamp)
Ippei Toyama: Seijun Tamura
Kaoru Gomi: Youji Ikuta
Yuuko Katori: Miki Haramoto (Onegai My Melody)
Shoujuu Matsushita: Hidenobu Kiuchi (Kemonozume)
Old Man From Oden Shop: Shirou Saitou (Arslan Senki (TV))
Kou Kazamatsuri: Hidenori Takahashi (Uta no☆Prince-sama♪ Maji Love Revolutions)
Souichirou Kirihara: Dai Matsumoto (Ganbarist! Shun)
Katsurou Shibusawa: Takashi Kondou (91 Days)
Seiji Fujishiro: Atsushi Abe (Shugo Chara!)
Ryou Mikami: Kenji Akabane (Meganebu!)
Shigeru Mamiya: Kaito Ishikawa (Haikyuu!!)
Takumi Kasai: Atsushi Tamaru (Tamako Market)
Ryouhei Tatsumi: Ryouta Akazawa (Terra Formars)
Seiya Amano: Youhei Hamada (Elite Jack!!)
Tomoyuki Yamakawa: Aoi Ichikawa
Tougo Amamiya: Kouji Yusa (Hakuouki)
Ryouichi Tenjou: Yuuichirou Umehara (Amanchu!)
Satoshi Ogata: Arthur Lounsbery (Starmyu)
Coach Rakuba: Masami Iwasaki (Katekyo Hitman Reborn!)
Tenshou Kajimura: Shinya Hamazoe (Yume-iro Pâtissière)
Tsubasa Shiina: Motoki Takagi (InuYasha)
Masaki Kurokawa: Yuuma Uchida (Macross Δ)
Teppei Koiwa: Yoshitsugu Matsuoka (Days (TV))
Yuuto Wakana: Junya Enoki (Uchuu Patrol Luluco)
Taki Sugihara: Natsuki Hanae (Diamond no Ace)
Eishi Kaku: Yoshimasa Hosoya (Ginga e Kickoff!!)
Takashi Narumi: Takuya Satou (JoJo no Kimyou na Bouken (TV))
Kazuma Sanada: Ryuuichi Kijima (God Eater)

Ending Theme Performance: "Sweet Days" by Yuki Kojima (CV: Yui Makino)

PV


Source: Comic Natalie