Tamon's B-side: Story, Cast and Series Facts

Story and premise

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.

Series details

• Title: Tamon's B-side
• Format: Animation
• Language: Japanese
• Genres: Comedy, Anime, Romance
• Premiere date: 2025-12-31
• Status in TVmaze: Running
• Web channel listed by TVmaze: U-Next
• Network country: Japan
• Typical episode runtime: 30 minutes
• TVMaze ID: 89110
• IMDb ID: tt37532722
• TVDB ID: 451101

Cast and credited roles

• Saori Hayami — Utage Kinoshita
• Kakeru Hatano — Tamon Fukuhara
• Masaaki Mizunaka — Wataru Fujita
• Saya Fukuzumi — Yuina
• Yurika Hirayama — Riko
• Shōya Chiba — Ouri Sakaguchi
• Tasuku Hatanaka — Keito Tachibana
• Kōhei Amasaki — Natsuki Ishibashi
• Ryuho Nagaoka — Rintaro Kai
• Takako Honda — Izumi Shiraishi
• Runa Sasaki — Homare Kinoshita
• Ayaka Nanase — Yamato Kinoshita

Seasons in the TVmaze catalogue

• Season 1: premiered 2025-12-31; final listed air date 2026-03-25.

Source and licence

Adapted from Tamon's B-side on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.