is a Japanese music-themed mixed-media project featuring themes of a cappella, high school girls and complex created by Pony Canyon and Takuya Yamanaka that began in April 2022. An anime television series adaptation produced by Jumondou aired from July to September 2025.
An anime adaptation was announced during the first event for the project on June 17, 2023. It was later revealed to be a television series produced by Jumondou and directed by Kiyoto Nakajima series composition and episode scripts by Takuya Yamanaka, Chisato Kikunaga and Hitomi Kaiho designing the characters, and Shun Narita composing the music. The series aired from July 17 to September 18, 2025, on Tokyo MX and BS Fuji. The opening theme song is , performed by the main cast. Plus Media Networks Asia licensed the series in Southeast Asia and broadcasts it on Aniplus Asia.