We don’t have a release date for rom-com anime Tamon’s B-Side just yet, but Utage is already helping her favorite idol through the city in a brand-new teaser visual unveiled today. Additional staff members were also confirmed.
The series will be exhibited at AnimeJapan 2025 on March 22-23 at the Shochiku booth and at a stage event held at the King Records booth with cast members in attendance.
Tamon’s B-Side Teaser Visual

Tamon’s B-Side‘s confirmed cast includes:
Utage Kinoshita voiced by Saori Hayami
Tamon Fukuhara voiced by Kakeru Hatano
Ouri Sakaguchi voiced by Shoya Chiba
Keito Tachibana voiced by Tasuku Hatanaka
Natsuki Ishibashi voiced by Kohei Amasaki
Rintaro Kai voiced by Ryuho Nagaoka
Based on the manga by Yuki Shiwasu, Chika Nagaoka (Case Closed: The Fist of Blue Sapphire) directs Tamon’s B-Side at studio J.C.STAFF, with series composition and scripts by Chiaki Nagai (22/7 (nanabun no nijyuuni)) and character designs and chief animation direction by Yoko Ito (Delico’s Nursery).
Viz Media publishes an official English version of the manga and describes the story:
Tamon is an insecure mess in real life, and what’s worse, he’s threatening to quit! Utage refuses to let anyone stand in Tamon’s way—least of all himself. What’s a fangirl to do but roll up her sleeves and support her favorite singer with everything she’s got?
Source: Official X (formerly Twitter)