Koeharu!

Koeharu! (声春っ!) is a Japanese television series starring members of the idol group Hinatazaka46. The show follows the students daily lives as they attend a voice acting school. The show aired on Nippon TV at 1:00 AM to 1:30 AM on Thursdays, and was available on Hulu Japan after it finished airing. The series is the third television series to feature Hinatazaka46, after Re:Mind and Dasada, but Koeharu! is the first to not include every member.

Premise
Meiko Hinowa (Mirei Sasaki) decides to enroll in a voice acting academy named "Kirameki Academy" to audition for a role in her favorite manga series that is getting an anime adaptation. She befriends people at her dormitory and school as they all work towards their dream roles.

Hinatazaka46

 * Mirei Sasaki as Meiko Hinowa (日ノ輪めいこ), soft-spoken and introverted student that's inspired to become a voice actor due to Enjō Kinakuji's manga work.
 * Akari Nibu as Mana Tendō (天道まな), student at the academy and self-proclaimed Meiko's rival.
 * Miho Watanabe as Amagasaki Amane (尼崎あまね), student at the academy. Attended the same high school as Meiko.
 * Miku Kanemura as Yukina Tsukikawa (月川雪菜), older student at the academy. Aspires to be an idol.
 * Hina Kawata as Tae Honda (本田多恵), student at the academy and admires Yukina.
 * Hinano Kamimura as Airi Kusama (草間愛理), student at the academy. Looks up to Meiko as a mentor.
 * Ayaka Takamoto as Chizue Harukaze (春風ちずえ), former student and dorm mother.
 * Konoka Matsuda as Mari Koshino (越野まり), Chizue's classmate and part of the idol duo "Maririn & Ruby"
 * Sarina Ushio as the voice of Luna (るーな), the narrator and the character on Meiko's handkerchief. Also appears as herself in the final episode.

Others

 * Kōichi Yamadera as Genmai Odawara (大俵玄米), headmaster at the academy
 * Aya Hirano as Iwao (岩尾), instructor at the academy
 * Naoto Takenaka as Enjō Kinakuji (金閣寺炎上), manga artist
 * Keiko Toda as Meiko's grandmother

Production
The series was announced on March 27, 2021 during the second day of Hinatazaka46's 2nd anniversary concert.

Koeharu aired on Nippon TV between April 29 and July 1, 2021, and was available on Hulu Japan after its broadcast. An accompanying talk show was also included on Hulu where Sarina Ushio, the narrator of the series, interviewed other Hinatazaka46 cast members.

Soundtrack
The opening and closing theme song, "Koe no Ashiato", is included in Hinatazaka46's single "Kimi Shika Katan". In the storyline, there are also two musical groups who each record a song in the series' soundtrack: "Röntgen Megane" (レントゲン眼鏡) by Maririn & Ruby (Konoka Matsuda and Suzuka Tomita), and "Hell Rose" by Chocola Chocola (Hina Kawata, Hiyori Hamagishi, and Mei Higashimura).