Ace of Diamond Act II reveals second-cour theme songs
GLAY and OxT provide the new opening and ending songs as the baseball anime’s second cour approaches its 11 October Japanese premiere.

Ace of Diamond Act II Second Season is stepping up to the plate with a new promotional video and two fresh theme songs for its second cour. GLAY will perform the opening song, “NEVER SAY NEVER AGAIN”, while OxT handles the ending theme, “ROAD TO BE BLUE”.
The second part of the season begins in Japan on 11 October, giving fans a firm date for the next stretch of the baseball anime.
What's actually going on
The anime’s official website and Anime News Network report that the second cour premieres on 11 October on TV Tokyo and its affiliated channels at 5:30 p.m. JST. It will also air on AT-X at 9:00 p.m. JST and stream on Netflix in Japan after broadcast.
The main cast returns, with Daisuke Sakuma joining as Shinichiro Saotome from Inashiro High School. Hideaki Ōba directs at OLM, replacing Mitsuyuki Masuhara, while Kenji Konuta returns to oversee the scripts.
Yasukazu Shōji is the current character designer and Hajime Hyakkoku returns to compose the music. The promotional video provides the latest look at the second cour, while the newly announced songs give it a fresh musical identity.
Why you should care
A second cour is where a sports anime can turn momentum into pressure. The October date means viewers in Japan have a clear appointment, and the returning staff and cast give the continuation a familiar creative foundation even as some key roles change.
GLAY previously performed music for the franchise, making its return a neat link between the new season and the series’ history. OxT’s ending theme adds a contrasting voice to the package.
The confirmed streaming detail is for Netflix in Japan. International viewers should wait for regional availability announcements rather than assume the Japanese platform listing applies everywhere.
Our opinion
Ace of Diamond Act II Second Season has the right ingredients for a strong return: a clear October date, a returning core cast and enough staff continuity to keep the dugout feeling familiar. GLAY and OxT also make the new music announcement more than background noise.
Recommendation: keep the second cour on your autumn calendar, especially if you enjoy sports anime that treat every at-bat like a small emotional crisis. The only missing piece for viewers outside Japan is confirmed regional streaming information.