'A Star Brighter Than the Sun' Anime Unveils Full Voice Cast, Production Team, and Opening Theme Ahead of October 2025 Premiere

Anticipation is building for the anime adaptation of Kazune Kawahara's beloved manga, Taiyou yori mo Mabushii Hoshi, also known as A Star Brighter Than the Sun. Exciting new details have just been released, setting the stage for its grand debut on October 2, 2025. This highly awaited series will premiere across TBS and its 28 affiliated stations, promising to captivate audiences with its poignant first-love narrative.

New Cast Members Revealed

The latest announcement unveils a stellar lineup of additional voice cast members, poised to bring even more depth to its compelling characters. Hina Youmiya steps into the role of Hisui Onodera, while Taito Ban voices Youta Ayukawa. Mutsumi Tamura takes on Mio Kagawa, and Ryouta Oosaka completes the ensemble as Yuushin Izawa. These talented individuals are set to enrich the intricate emotional landscape of the story, promising performances that will resonate deeply with viewers.

Production Team and Music

Leading the production is Studio Kai, a name synonymous with quality adaptations, known for its work on titles such as Skeleton Knight in Another World. Director Aya Kobayashi is at the helm, ensuring a faithful yet fresh interpretation of the source material. Yasuhiro Nakanishi is crafting the scripts, and Jinfeng Zeng masterfully handles character designs, preserving the manga's cherished visual aesthetic. Adding to the series' allure, Motohiro Hata will perform the opening theme song, Stellar Days. This evocative track is designed to perfectly complement the anime's romantic and dramatic undertones, setting the mood for each episode.

The Story and Its Acclaimed Source

At its heart, Taiyou yori mo Mabushii Hoshi explores the charmingly bittersweet romance between Sae Iwata, a girl notable for being taller than average, and the immensely popular Koki Kamishiro. The source material, Kazune Kawahara's original manga, commenced serialization in Shueisha's Bessatsu Margaret in 2021. It quickly rose to critical acclaim, culminating in its victory at the 14th An An Manga Award in 2023, a testament to its widespread appeal and emotional depth.

A Glimpse into the Future

Fans can now immerse themselves further into the world of Sae and Koki with the newly unveiled first promotional video and a striking key visual. Both offer a tantalizing glimpse into the warm and heartfelt atmosphere that awaits them this autumn. Studio Kai's comprehensive staff and casting announcements underscore their unwavering commitment to delivering a high-quality adaptation that truly honors the emotional resonance of Kawahara’s celebrated work. This series is poised to be a highlight of the 2025 anime season, and we eagerly await its premiere.