SawanoHiroyuki[nZk]:Rei Shares TO BE HERO X Anime Opening Song Music Video

SawanoHiroyuki

SawanoHiroyuki[nZk] is a project focusing on vocal music developed by composer Hiroyuki Sawano, who also provides music to artists and produces music for TV dramas, anime (including Attack on Titan, Blue Exorcist, Solo Leveling) movies, and other visual media.

The project’s official YouTube channel has released a music video for its 13th single song, “INERTIA,” which is now used as the opening theme for the spring 2025 TV anime TO BE HERO X. The music video features Sawano and the song’s guest vocalist, Rei (Newspeak).

SawanoHiroyuki[nZk]:Rei “INERTIA” Music Video

TO BE HERO X Creditless Opening Video

The CD single of “INERTIA” is set to release in Japan on June 11. Prior to the CD release, the title tune is now available on digital platforms for streaming and download.

SawanoHiroyuki[nZk]:Rei Shares TO BE HERO X Anime Opening Song Music Video — Time-limited production edition CD jacket

TO BE HERO X premiered in Japan on April 6, 2025. Crunchyroll is streaming the anime for members in North America, Central America, South America, Europe, Africa, Oceania, the Middle East, CIS, Indian subcontinent and Southeast Asia.

Crunchyroll describes the series as such:

In a world full of brilliant heroes, it’s the trust of fans that turns heroes into superheroes. If a hero loses the people’s trust, they lose their special abilities. Trust value is collected, quantified, and used to determine a hero’s ranking, displayed on their wrist. Every two years, the top heroes go to a tournament to fight, determine new trust values, and earn their rankings.

Source: SawanoHiroyuki[nZk] official YouTube channel