The highly anticipated original TV anime, SI-VIS: The Sound of Heroes, is slated to begin its broadcast on October 5, 2025, marking the start of what is expected to be a half-year run. While details regarding the specific theme song artists are still under wraps, the production committee has confirmed that Sony Music is overseeing the selection of vocal talents for the in-show unit SI-VIS, with further announcements anticipated.
The series, a collaborative effort between Aniplex and Sony Music, promises a unique blend of music and heroism, with the titular co-ed vocal unit secretly battling mysterious threats to the world through the power of their live performances.
Premiere Details and Broadcast Schedule
SI-VIS: The Sound of Heroes is set to premiere on Fuji TV on October 5, 2025, at 9:30 a.m. JST. For international audiences, Crunchyroll will be streaming the series worldwide, excluding Asia. This prominent placement and global distribution signal a significant push for the original anime project.
Anticipated Half-Year Duration
While specific episode counts are yet to be formally announced, the indication of a “half-year run” suggests the anime will span approximately two cours, typically translating to 24-26 episodes. This extended broadcast period would allow for a more in-depth exploration of the series’ “Music x Hero” theme and its ensemble cast.
The Melodies of Heroism: Music Production
At the core of SI-VIS: The Sound of Heroes is its musical element, as the in-story vocal unit, SI-VIS, harnesses the energy from their audience during live performances to combat mysterious calamities. Shuhei Mutsuki is credited with composing the background music for the series, setting the auditory landscape for the heroic tale.
Vocal Artists to be Revealed
A key aspect of the anime’s musical identity lies in the performances of the SI-VIS unit. Aniplex and Sony Music have stated that Sony Music is responsible for selecting the vocal artists who will provide the singing voices for the characters. These artists are expected to be revealed at a later date, building anticipation for the project’s complete musical lineup. An insert song titled “MELODEA,” performed by the in-show unit SI-VIS, was featured in a teaser trailer released on September 13, 2025.
Creative Team and Story Premise
The anime boasts a notable creative team. Fumiaki Maruto, known for his work on Saekano: How to Raise a Boring Girlfriend, is overseeing and writing the series scripts, promising a compelling narrative. Original character designs are handled by Hidari, recognized for projects like Santa Company and Fractale. The animation production is by Studio VOLN.
The story centers on the co-ed vocal unit SI-VIS, which has achieved widespread popularity both domestically and internationally. Unbeknownst to the public, these talented performers lead a double life as heroes, using their concerts as a means to gather power and fight against a mysterious force threatening to destroy the world. The series is described as an ensemble drama and coming-of-age story for its young characters.
Main Cast and Characters
The main voice cast includes:
- Ayane Sakura as Siren
- Sōma Saitō as JUNE
- Daisuke Namikawa as YOSUKE (Leader)
- Nobunaga Shimazaki as Sōji
- Akari Kitō as μ (Myu)
The combination of a strong voice cast, experienced creative staff, and a unique premise combining music and heroics sets the stage for SI-VIS: The Sound of Heroes to be a prominent title in the upcoming anime season.
