Tamon's B-Side is a oNA (web) anime that premiered in winter 2026, produced by J.C.STAFF.

About the production: the story comes from a manga, there are 13 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy, music and romance, with themes such as Otaku Culture, Female Protagonist, Shoujo and Idol.

On AniList, Tamon's B-Side has an average score of 78%, a very good score, and appears on 48,508 users' lists.

Utage Kinoshita is a high school girl who works part-time as a housekeeper. She has devoted her life to her favorite idol, Tamon Fukuhara, from the group F/ACE. Then one day, Utage ends up being assigned to Tamon’s house! There she discovers that off-stage, he is nothing like his wild idol persona. A gloomy, introverted boy with no self-confidence, Utage still finds herself falling for him anyway. (Source: Crunchyroll)

Official synopsis from AniList.