Si-Vis: The Sound of Heroes is a Japanese original anime television series produced by Aniplex and Sony Music Entertainment Japan. It is animated by Studio VOLN and directed by Daisuke Yoshida, with series composition by Fumiaki Maruto, and features original character designs by Hidari adapted for animation by Nami Fujii, and music by Shuhei Mutsuki.[1][2][3] The series premiered on October 5, 2025, on Fuji TV and other networks, and will run for two consecutive cours.[4] Crunchyroll is streaming the series.[5] For the first cours, the opening theme song is "So Far Away", while the ending theme song is "Friends & Smile", both performed by in-story unit Si-Vis.[6]