is a Japanese light novel series written by and illustrated by . It began publication in February 2020 under ASCII Media Works' Dengeki Bunko imprint. As of July 2025, thirteen volumes have been released. A manga adaptation illustrated by Umemi Makimoto was serialized in ASCII Media Works' manga magazine Dengeki Maoh from March 2020 to April 2025, and in Kadokawa's ' website from May 2025 to January 2026; its chapters were collected into six volumes. An anime television series adaptation produced by Connect aired from April to June 2024.
Yumiko Sato is a high school student who secretly works as a voice actress under the stage name Yasumi Utatane. One day, she has a hostile encounter with a quiet and reserved classmate named Chika Watanabe. When she lands a role to co-host a radio program, Yumiko discovers her partner is none other than Chika, who also secretly works as a voice actress under the stage name Yuhi Yugure. While they are friendly on the program, off air, they constantly bicker with each other. The story follows their tumultuous relationship.
Written by and illustrated by , The Many Sides of Voice Actor Radio began its publication on February 7, 2020, under ASCII Media Works' Dengeki Bunko imprint. As of July 2025, thirteen volumes have been released.
Its spin-off novel short stories Seiyà « Radio no Ura Omote DJCD was serialized on Dengeki Bunko's website Dengeki Novecomi+ from October 30, 2023, to January 1, 2024. It was released in a single volume with illustrations by Umemi Makimoto on April 10, 2024.
A manga adaptation illustrated by Umemi Makimoto was originally serialized in ASCII Media Works' Dengeki Maoh magazine from March 27, 2020, to July 27, 2021. In July 2023, it was announced that the manga would restart serialization and continue to be illustrated by Makimoto. The series restarted serialization in Dengeki Maoh, publishing eleven chapters from December 26, 2023, to April 25, 2025. It continued in Kadokawa's ' website on May 31, 2025, and ended on January 3, 2026. Its chapters were compiled in six volumes, released from August 2020 to January 2026.
An anime television series adaptation was announced on December 21, 2022. It was produced by Connect and directed by Hideki Tachibana, with scripts written by , characters designed by Shoko Takimoto, who also served as chief animation director, and music composed by and . The series aired from April 10 to June 26, 2024, on AT-X and other networks. The opening theme song is "Now On Air", performed by Miku Ità Â, and the ending theme song is "Stand by You", performed by Ità  and Moe Toyota as their respective characters. Crunchyroll is streaming the series. Plus Media Networks Asia licensed the series in Southeast Asia.
In 2019, Seiyà « Radio no Ura Omote won the Grand Prize at the 26th Dengeki Novel Prize. The series ranked 15th in the bunkobon category and eighth in the new work category of the 2021 edition of Takarajimasha's Kono Light Novel ga Sugoi! guide book; it ranked 16th in the bunkobon category of the 2022 edition.