by The long-awaited showdown between Seido High School and Inashiro Industrial is finally approaching.
A new teaser PV for the second cour of the TV anime Ace of Diamond actII -Second Season- has been released, giving fans their first major look at the upcoming final match between the two powerhouse baseball teams.
Based on the popular baseball manga by Yuji Terajima, Ace of Diamond has built a dedicated following through its intense matches, detailed baseball strategy,y and coming-of-age story. The newly released PV highlights the emotional history between Seido and Inashiro while teasing another high-stakes battle involving Eijun Sawamura, Satoru Furuya and Mei Narumiya.
The second cour is scheduled to begin broadcasting in October 2026, continuing the story of Seido’s pursuit of a place at Koshien.
The Final Match Against Inashiro Is Finally Here
The teaser PV opens with a powerful reminder of the previous summer.
Seido’s players are shown shedding tears after their dreams of reaching Koshien were crushed by Inashiro Industrial.
That defeat has remained an important motivation for the Seido players.
Now, one year later, the two teams are facing each other again in the decisive final match.
For Seido, the game represents an opportunity for revenge and redemption.
For Inashiro, however, the stakes are just as high. The powerhouse team is aiming to secure its third consecutive appearance at Koshien.
The two teams therefore enter the game with completely different reasons for wanting to win—but neither side can afford to lose.
Sawamura, Furuya and Narumiya Take Center Stage
The new PV puts particular emphasis on three pitchers who have become central figures in the Ace of Diamond story.
For Seido, Satoru Furuya is scheduled to take the mound as the starting pitcher.
Furuya’s powerful pitching has made him one of Seido’s most important weapons, and his development has been closely connected to Sawamura’s own growth.
Meanwhile, Eijun Sawamura is expected to take the role of reliever.
This is significant because Sawamura’s journey from an inexperienced pitcher to a dependable member of Seido’s pitching staff has been one of the central storylines of the series.
Standing on the other side is Mei Narumiya, Inashiro Industrial’s ace.
Narumiya is regarded as one of the strongest pitchers in the series and has a long-standing connection to Seido’s players.
With Furuya, Sawamura, and Narumiya all involved, the upcoming match promises to be one of the most important pitching battles in the anime.
Seido Wants to Rewrite Last Year’s Ending
The emotional core of the teaser is Seido’s previous defeat.
The team came agonizingly close to achieving its goal, only to have its Koshien dream ended by Inashiro.
For players such as Sawamura and Furuya, that loss became an important part of their development.
They have spent the following year training, competing for positions and improving their skills.
Now they have another opportunity.
The fact that the final opponent is once again Inashiro makes the situation even more dramatic.
It is not simply another baseball game.
For Seido, it is a chance to prove how much the team has changed since its previous defeat.
Inashiro Is Fighting for a Third Straight Koshien Appearance
While Seido is motivated by revenge, Inashiro has its own enormous objective.
The team is attempting to earn a third consecutive appearance at Koshien.
That means the upcoming game is not merely about stopping Seido’s revenge.
Inashiro must protect its own legacy.
The presence of Narumiya makes the challenge even more difficult for Seido.
His experience, confidence, and pitching ability have repeatedly made him one of the most intimidating opponents in the series.
The PV therefore creates an interesting contrast:
Seido is chasing redemption, while Inashiro is defending its position as a dominant baseball powerhouse.
What Is Ace of Diamond About?
For newcomers, Ace of Diamond is a long-running high school baseball series created by Yuji Terajima.
The story follows Eijun Sawamura, a passionate left-handed pitcher who dreams of becoming the ace of his team.
After leaving his hometown, Sawamura enrolls at Seido High School, one of Japan’s strongest high school baseball programs.
However, becoming the ace is not easy.
Seido already has numerous talented players, including powerful pitcher Furuya.
Sawamura must therefore compete with his teammates while simultaneously learning how to become a better pitcher.
The series combines baseball matches with character development, friendships, rivalries, and the pressure of competing at the highest level of high school baseball.
The Rivalry Between Sawamura and Furuya
One of the most important relationships in Ace of Diamond is the rivalry between Sawamura and Furuya.
Although they play for the same team, both pitchers want the same thing: to become Seido’s ace.
Their rivalry is not simply about personal competition.
Both players push each other to improve.
Furuya possesses extraordinary natural power and a fastball that can overwhelm hitters. Sawamura, meanwhile, has developed a distinctive pitching style built around movement, control, and his ability to read situations.
Their contrasting strengths have made their rivalry one of the most entertaining elements of the series.
The upcoming Seido vs. Inashiro match will therefore be another major test of how far both pitchers have come.
Narumiya Remains a Major Obstacle
For Seido fans, Narumiya is a familiar—and extremely dangerous—opponent.
As Inashiro’s ace, he represents the kind of pitcher Seido must overcome if the team wants to reach Koshien.
His presence in the teaser immediately raises the tension surrounding the match.
Narumiya is not simply another opponent.
He is connected to Seido’s previous heartbreak, making the rematch emotionally significant.
The PV’s focus on Sawamura, Furuya and Narumiya suggests that the pitchers will play a decisive role in determining the outcome.
A Major Moment in the Ace of Diamond Anime
The Ace of Diamond anime first began airing in 2013.
The franchise subsequently received multiple anime seasons, including the original Ace of Diamond series, Ace of Diamond: Second Season, and Ace of Diamond actII, which aired from 2019 to 2020.
The story continued with ** Ace of Diamond actII -Second Season- **, which began broadcasting in April 2026.
The first cour established the latest stage of Seido’s journey, while the second cour will move into the highly anticipated showdown against Inashiro.
For longtime viewers, this means the anime is approaching one of its most emotionally significant matches.
Why the New Teaser PV Is Generating So Much Excitement
The teaser is effective because it does not simply show baseball action.
Instead, it reminds viewers why this match matters.
The images of Seido’s players crying after their previous defeat establish the emotional stakes before the new match even begins.
Then the PV shifts toward the present, showing the team’s determination to overcome its past.
That structure makes the upcoming game feel like the culmination of a long journey.
For viewers who have followed Sawamura and his teammates for years, seeing the same two teams meet again creates a strong sense of closure and anticipation.
What to Expect From the Second Cour
The second cour is expected to focus heavily on the Seido vs. Inashiro final.
Viewers can look forward to:
Seido’s rematch against Inashiro Industrial
Furuya taking the starting mound
Sawamura’s role as a relief pitcher
Narumiya leading Inashiro’s pitching staff
Seido’s attempt to avenge its previous defeat
Inashiro’s fight for a third consecutive Koshien appearance
High-pressure baseball strategy and pitching battles
Emotional moments involving Seido’s players
The culmination of years of character development
The match is likely to test not only individual players but also Seido’s ability to function as a complete team.
When Will Ace of Diamond actII -Second Season- Cour 2 Air?
The second cour of Ace of Diamond actII -Second Season is scheduled to begin broadcasting in October 2026.
The first cour began airing in April, while the second cour will continue the story later in the year.
With the newly released teaser PV now setting up the Seido vs. Inashiro showdown, anticipation is likely to increase as the October premiere approaches.
Final Thoughts
The new teaser PV for Ace of Diamond actII -Second Season has given fans an exciting preview of the next major chapter in Seido High School’s baseball journey.
The final match against Inashiro Industrial carries enormous emotional weight. One year after Inashiro ended Seido’s Koshien dream, the teams are meeting again under even greater pressure.
For Seido, it is a chance to rewrite the past.
For Inashiro, it is an opportunity to secure another Koshien appearance and protect its reputation as one of the strongest teams in high school baseball.
With Furuya starting, Sawamura waiting in relief and Narumiya leading Inashiro, the pitching battle alone promises to be one of the highlights of the second cour.
More importantly, this match represents everything that Ace of Diamond does best: competition, friendship, rivalry, perseverance, nd the determination to keep moving forward after defeat.
For longtime fans, October 2026 cannot come soon enough.
