ETERNITY MEMORIES is a special anime that premiered in summer 2022, produced by CygamesPictures.

About the production: the story comes from a video game, there is 1 episode of about 50 minutes and its current status is "finished".

Its main genres are fantasy, music and slice of life, with themes such as Idol, Alternate Universe, Ensemble Cast and Dancing.

On AniList, ETERNITY MEMORIES has an average score of 69%, a good score, and appears on 1,727 users' lists.

A special commemorating the 10th anniversary of the THE IDOLM@STER Cinderella Girls franchise. The anime features all 190 idols from the series. Note: A 6-minute preview "Celebration Animation" of ETERNITY MEMORIES was released on November 28, 2021, first unveiled during Day 2 of "THE IDOLM@STER CINDERELLA GIRLS 10th ANNIVERSARY M@GICAL WONDERLAND TOUR!!!: Celebration Land" live concert. The video was reuploaded on September 7, 2022 onto the IDOLM@STER Channel, correcting spelling, omissions, and credits on the initial upload that was on YouTube.

Official synopsis from AniList.