The Seido baseball club has been invited to the spring invitational at the hallowed Koshien Stadium. Sawamura will finally stand on the mound! Standing between Seido and the national title are the winners of last year's summer tournament Komadai Fujimaki and their unstoppable ace Masamune Hongo. Can Seido triumph over Komadai? It's the start of another heated battle in youth baseball!

In the second round of the invitational, Seido faces Nihon Shono. After throwing a 150 km/h pitches to shut down batters in the first round, Furuya has become the darling of the press and the fans. Which team will advance to the quarterfinals? What about the other team from Tokyo, Yakushi led by Todoroki Raichi? And what of the summer tournament winners, Komadai Fujimaki? The quarterfinals are taking shape.

It's ninth day and fourth round of the spring invitational and Seido will finally face Komadai Fujimaki. It's Masamune Hongo's first start of the tournament, and he has not given up a single run. How will the Seido batters counter his 150 km/h fastballs and sharp splitters? Meanwhile, Furuya is starting for Seido. How will he fare against the Komadai Fujimaki batters?

The quarterfinal match against Komadai Fujimaki is wrapping up. Miyuki earned Seido's only hit against Komadai Fujimaki's Hongo in seven innings. However, Seido's Furuya continues to respond to Hongo and improve his game. Will Seido be able to earn a spot in the semifinals? Will Sawamura get a chance to play?

Losing to Komadai Fujimaki, Seido is out of the spring invitational. What did Furuya as he pitched against Hongo? But there's no time to bask in the afterglow of Koshien Stadium. The Seido lineup is shifting once again. New first-years are joining the team. The other baseball club members are carefully measuring the time left until the summer tournament. And then Haruichi unveils a unexpected change.

Seido has little time to rest after the spring invitational before the Tokyo spring tournament. Their first round opponent is Eigen High School. Kawakami is the lead-off pitcher, but the crowd is expecting Furuya who shone at Koshien Stadium. Will Furuya make an appearance? And what about Sawamura, who was disappointed and Koshien Stadium and is all too aware of Furuya's prowess?

A third-round game at the Tokyo spring tournament is attracting a lot of interest. Inashiro Industrial, the runner-up team from last year's summer tournament with this generation's best southpaw, Mei Narumiya, is facing Yakushi, a quarterfinal finisher from the spring invitational. How have they grown after their winter training and experience in the invitational? Has Narumiya recovered after his disappointing run in the fall? This heavily watched game is about to get under way!

At Meiji Jingu Secondary Stadium, the sparks are flying as Inashiro and Yakushi's game wraps up. Meanwhile, Okumura and the other new Seido first-years are learning how tough high school baseball can be. Seido can seat 20 players on the bench for the spring tournament, but they've only registered 18. Coach Kataoka purposely left two spots open so the third-years for whom this is the last summer tournament, as well as the second and new first-years will compete for them.

Seido has made it to the fourth round of the Tokyo Spring Tournament. With East and West Tokyo competing, there are some interesting games coming! Teito, a school that has played many times at Koshien Stadium and defeated the reigning champions Inashiro in last year's fall tournament, is facing Ugumori who have been getting lots of attention. The winner of this game will play Inashiro in the fifth round! It will be a match to see!

Sawamura goes to tell Miyuki about Okumura's outburst, but remembers his own conflict with upperclassmen and judging Chris before knowing his situation. In the spring tournament, Teito's game against Ugumori finishes and Seido will face Kasuga First High in the quarterfinals. Will Furuya start, or Sawamura? With Ichidai Third High's Amahisa and the new first-years watching, Coach Kataoka declares they will win and selects the starting pitcher...

It's the quarterfinals of the spring tournament and Seido is playing Kasuga First High. In the bottom of the third inning, Haruichi Kominato gets a timely hit to give Seido the lead and bring the cleanup Miyuki up to bat. Can Miyuki take the pressure of starting pitcher Sawamura? The fifth inning sees a big chance for Kasuga First. Can Sawamura see the game through? Meanwhile, the effect of Koshien Stadium on Furuya has become apparent, making him more focused on being the ace. What is it he sees, looking forward?

After being added to the bench, first-year Masashi Yuki hits a home run in his first game. Okumura, Yui and Asada, each with their own emotions, are practicing and getting more familiar with the team. The team is preparing for their next game against Ichidai Third High. During practice, Miyuki prioritizes catching for Furuya, which frustrates Sawamura. Having been reproached by Miyuki for clasing with Sawamura, Okumura volunteers to catch for him.

The spring tournament game against Ichidai Third High has finally begun. Seido is batting first against Ichidai Third High ace Kosei Amahisa. Seido's cleanup starts as Haruichi Kominato steps up to the plate with one out and a runner on third. Will Miyuki getting them to bat first help them take the lead? Meanwhile, Seido's starting pitcher Furuya takes the mound with the same emotions he felt in the Invitational. The early innings are turning into a heated battle!

The spring tournament game against Ichidai Third High has finally begun. Seido is batting first against Ichidai Third High ace Kosei Amahisa. Seido's cleanup starts as Haruichi Kominato steps up to the plate with one out and a runner on third. Will Miyuki getting them to bat first help them take the lead? Meanwhile, Seido's starting pitcher Furuya takes the mound with the same emotions he felt in the Invitational. The early innings are turning into a heated battle!

It's Seido vs Ichidai Third High in the spring tournament semifinals. Up 2 - 0 until the fifth inning, Seido's starting pitcher Furuya faces an Ichidai rally. Unable to control the ball, his pitching continues to falter. Miyuki trusts Furuya as the ace and does his best to guide him. However, after his third walk in one inning, Coach Ochiai gives Coach Kataoka a bit of advice, helping him make a firm decision to...

It's the spring tournament semifinal game against Ichidai. After saving his team with his perfect relief pitching, Sawamura is now the lead-off batter in the top of the sixth. Can Sawamura get on base and lead his team in a counterattack? Ichidai Third High's Amahisa's impeccable pitching hasn't allowed Seido a run since the second inning. Will the Seido batters support Sawamura and mount a comeback? Which team will advance to the final?

After their own semifinal game the nine Seido players watch Inashiro's semifinal against Teito. Narumiya and Mukai both played at Koshien Stadium as first-years, and then received their powerhouse school's ace number as second-years, and they'll both be pitching. Meanwhile, Seido High School is analyzing their game against Ichidai Third High, focusing on Coach Kataoka. Then, Miyuki remembers a certain thought...

After seeing the result of the spring tournament, the Seido players think about what they lack, and begin to act on it. Sawamura shows an especially strong will to improve, and it propagates to other third-years. Meanwhile, the final game of the spring tournament is being played. Miyuki and Furuya, who has felt pressure ever since playing at Koshien Stadium, are at Meiji Jingu Secondary Stadium to see it.

Coach Kataoka announces the team will play an intrasquad game, setting the practice fields abuzz. The first-years are eager to perform in order to make the second string, but so are the upperclassmen who want to make the first string. With Sawamura and the other main players looking on, first-year Kukki starts the game. How will Okumura, Seto and the other first-years counter the intense competitive spirit of the upperclassmen?

The first-years are playing the second and third-years in an intrasquad game. In the third inning, the Asada-Okumura battery comes on to face the upperclassmen. After seeing Okumura and Seto's aggressive play, Asada thinks to himself that he wants to live upto Okumura's expectations. Will Asada's pitches hit their mark? Meanwhile, Kawashima continues his intense pitching to try to take back his illustrious spot on the bench. Can Okumura and Seto's devious batting continue to work on the upperclassmen?

With the intrasquad game over, Kataoka selects those who will be on the first string, causing joy and sorrow among the first-years and the upperclassmen. Meanwhile, Miyuki begins talking about the team at length with Kuramochi in their classroom. Although he says, "Honestly, no amount of time would be enough," Kuramochi says Miyuki still seems to be enjoying himself.

Miyuki has ordered Sawamura and Furuya to practice with the first-year catchers. Will they be able to lead and live up to Miyuki's expectations? During night practice, Sawamura is enthusiastic to have Miyuki catch for him. Then Coach Kataoka shows up and watches the numbered pitches Sawamura throws to Miyuki. Kataoka has something to tell Sawamura.

During the long break in May, the powerhouse schools travel to different parts of the country to compete in practice games to prepare for the summer tournament. Fujimaki Komadai has traveled to Osaka to play Osaka Kiryu; Inashiro is playing Saiho in Aichi; Yoshinaga from Tokushima is in Kumamoto playing Shogakkan. Seido tides themselves over by playing Yamaga in Saitama, but then it's time for Sawamura to take the mound against Hakuryu, a team that finished in the semi finals of the Invitational.

The game against Hakuryu and third batter Mima is finally under way. They are one of the most mobile teams in the country. Sawamura finds himself in trouble early in the first inning. Will his pitching style work against the Hakuryu batters? Meanwhile, Seido has changed up their batting order to be more aggressive after their loss in the spring tournament. How will they fare in this game?

Sawamura's pitching is looking strong against Hakuryu. Mima and the high school baseball fans were expecting to see Furuya pitch, but they have to acknowledge Sawamura's skill. Meanwhile, out in left field, Furuya can't stop thinking about standing on the mound. What will Kataoka do as he loses his focus? And then, Sawamura faces Mima for the third time.

The game against Hakuryu, a quarterfinalist in the Invitational, is entering the final stretch. What has Sawamura felt and learned facing a nationally ranked powerhouse school? What did Furuya feel and learn watching Sawamura pitch the game on his own? Both pitchers have mixed emotions. Meanwhile, Mima, who also wants to play professionally, has taken an interest in Miyuki.

Seido’s first string returns from the golden week practice games. Due to Sawamura’s outstanding performance in the Hakuryu match, an article about him was published, making his presence known. Coach Kataoka hands out baseball journals with some comments about the practice games written in them. Sawamura’s comments from the coach serve to motivate him to work harder, while Furuya’s compels him do some self reflection. The team practices fielding with the coach.

After a series of successful practice games, the Seido Nine are intensely focused on preparing for the summer tournament. Sawamura, encouraged by Kataoka's words, begins rising early in the morning to train. Meanwhile, after seeing Sawamura's improvement, Furuya tries to help out with batting practice. Their rivalry seems to be having a positive influence on both of them, until...

The Seido baseball team is hard at work preparing for the summer tournament. Meanwhile, the team managers are reviewing notebooks and clippings of newspaper and magazine articles about the team since their appearance at the Invitational. They remember the passionate emotions of Sawamura and Furuya during the games. Seeking consecutive spring and summer appearances at Koshien Stadium, they are striving to improve.

Sawamura is the starting pitcher in the practice game against Chiba's powerhouse, Naruta Industrial. How will his pitches fare against their batters known as the Southpaw Killers? It will be another trial for Sawamura, who must handle another big game. Plus, Naruta Industrial and Kuramochi have a previous relationship. What happened between then?

In order to prepare for unforseen circumstances in the summer tournament, Coach Kataoka has the players play out of their normal positions. Sawamura played left field in a practice game and Furuya played the infield during batting practice. Coach Kataoka asks straight-out if Yui, a first-year who made the first string, if he can play multiple positions. How will Yui, who has played catcher his whole career, respond?

Returning from his injury, Furuya joins a game with the second string. Seeing Sawamura shine in the first string's game, Furuya mulls over the words Kataoka wrote in his journal. Meanwhile, in Yamanashi prefecture, Seido's rivals Yakushi, Ichidai Third High and Inashiro Industrial compete in intense games for the spring Kanto Tournament. Sawamura and his teammates watch intensely as their rivals become stronger.

Sawamura has demonstrated his remarkable growth during the practice games, and people have taken notice, especially his outstanding performance in the Hakuryu game. His pitching has inspired Furuya, too. In the second-string game, Furuya's pitching showed meaningful progress. His emotions transfer into the ball.

An announcement is made that Miyuki will leave the team and play in the Tokyo Invitational. Seto and Okumura will play on the first string while Maezono and Kuramochi take charge of the team. Miyuki sets off for the Inashiro Industrial practice field where the invitational will be held. Well-known players from several schools arrive for the team's first meeting.

It's the Tokyo Invitational game against the Wynd Youth Academy. The starting pitcher is Shunshing Yeung from Akikawa Academy. He's known as a precise machine, but because of JHBF regulations, it's his first game in quite a while. How will Yeung's pitches fare against the American team? Meanwhile, Seido's round-robin games against Seiho and Yamamori are underway. How will Seido take on these powerhouse schools without Miyuki?

Miyuki's team in the Tokyo Invitational is having trouble batting against Wynd Youth's left-handed pitcher Conrad. The American team has the lead going into the seventh inning, when Narumiya finally takes the mound. Meanwhile, Furuya and Ono have formed a battery to take on Yamamori. Ono is quietly eager to help Furuya pitch the way he's used to, even without Miyuki.

Taking the mound in the seventh inning against the American Wynd Youth team, Narumiya strikes out their cleanup batter Carlisle, but his last swing is so hard, it goes full circle and hits catcher Inui in the head. Coach Kunitomo decides to switch catchers. As Miyuki dons the catcher's mask, he and Narumiya form a battery that should be impossible. Meanwhile, Seido is playing Yamamori Academy in a practice game. With Miyuki away, Ono is making impressive gutsy plays, until there's an accident...

It's the final innings of the game against the Wynd Youth. Following Narumiya's masterful relief pitching, the other Inashiro players, Carlos, Shirakawa and Yamaoka have really shone. Miyuki is reminded how imposing his rival team is. Meanwhile, in Seido's practice game against Yamamori, Yui is wearing the catcher's after Ono had to leave the field. Several walks and battery errors are making the game difficult. Yui blames himself for throwing off Furuya's rhythm.

After losing Ono to an injury, the Furuya-Yui battery has trouble establishing a rhythm, repeated making errors and walking batters. Still unable to recover, they give up runs and with the team in trouble, Furuya has to leave the mound. Kaneda the relief pitcher pitches well, but he is unable to stop Yamamori Academy's momentum, and Seido's winning streak ends at nineteen games. In game 2 against Seiho High School, the beast of Aichi, Sawamura is the starting pitcher. After receiving encouragement from Coach Kataoka, Sawamura boldly takes the mound.

It's Seido's practive game against Seiho, the beast from Aichi. Sawamura has a great first inning, striking out two batters. They're facing Seiho's ace Akashi, once hailed as the super rookie when he played at Koshien Stadium as a first-year. After an injury caused his form to deteriorate, he spent a year in obscurity. Now, he has returned armed with a muscular body and powerful pitches. The Sawamura-Okumura battery must cooperate to take on Seiho's machine-gun-like batting lineup.

The tense practice game against Seiho is tied at 0. Sawamura gets into trouble in the top of the sixth inning, but an incredible throw to home by center fielder Aso pulls the team through. In the bottom of the same inning, lead-off batter Yuki's hit arcs high. How far will it go? Meanwhile, Sawamura is feeling the weight of his responsibility to the coach and his team and continues spiraling down. His dogged determination is obvious to not only the nine fielders, or the players on the bench, but even to the fans in the stands.

On the train home after the Tokyo Invitational game, Miyuki meets Narumiya and gives him some honest advice. They promise an intense battle in the summer tournament. Meanwhile, the fierce game against Seiho on Seido's practice field has come to an end. The Seido nine reflect on their challenges to address, including those from their loss to Yamamori Academy. It's now time to decide the twenty players who will make the roster for the summer tournament.

The Seido baseball team is holding their summer training camp. The managers are working hard to prepare onigiri for them to eat. Sawamura is trying to eat natto, his least favorite food, in order to gain the stamina to pitch for nine innings without getting tired. The players are keenly interested in who will perform well in the training camp and earn a numbered jersey for the summer tournament. Will Sawamura, Furuya or Kawakami earn the right to wear the ace number?

It's the final day of the summer training camp. The batters of the Seido nine are doing all they can to prepare to face top-tier pitchers like Narumiya and Amahisa. That evening, Coach Kataoka starts fielding drills that work the players to the bone. The next day is the drawing to decide which block each school will play in for the summer tournament. What teams will Seido High School be up against?

Showing the sum total of his pre-tournament training, Sawamura pitches impressively against powerhouse school Kokonoe, holding them to two runs in eight innings. Meanwhile, Ochiai still holds esteem for Furuya who wore the ace number and still continues to improve. Will Seido's ace for this summer be Sawamura, or Furuya? What will Kataoka decide?

Seido awaits their first game of the summer tournament. Sawamura wants to get used to wearing the ace number and so begins to sleep in his uniform, earning him a teasing from his roommates. Coach Kataoka receives an stimulating call from his former mentor Coach Sasaki, the coach of Yura Sogo Engineering High School who they are about to face. Yura Sogo competes in the first round anticipating their game against the seeded Seido. What does the cunning Coach Sasaki have up his sleeve?

The summer tournament is finally under way. Seido's first opponent, Yura Sogo led by Coach Sasaki, is preparing themselves thoroughly for the game. Narumiya starts the first game for Seido's rival, Inashiro. Even though their opponent is no match for them, Inashiro never wants to show any sign of weakness in a baseball game. In stadiums around the country, powerful schools begin their battles. And now it is time for Sawamura to take the mound for the first time as ace...

Sawamura takes the mound with the ace number for Seido's first game of the summer tournament. But the first batter gets on base which messes up his rhythm, and he gives up one run in the first inning. With another runner in scoring position, Coach Sasaki has the Yura Sogo batters aim for Sawamura's inside fastballs. Sawamura's been caught in Sasaki's cunning trap. Can they get back in the game?

Seido's first game of the summer tournament against Yura Sogo is heating up. In the first inning, Seido allowed two runs and only scored one, giving Yura Sogo the lead. Sawamura walks the lead-off batter in the top of the fourth inning and is struggling to regain his composure. Will Kataoka decide to keep Sawamura in or switch pitchers? Meanwhile, the Seido fielders rally to support their pitcher. Will Seido be able to strike back?

Seido has defeated Yura Sogo in a called game. Reflecting on their inability to establish a rhythm in the early innings, Seido begins to analyze and strategize against their next opponent, Hachiya Oji. Of particular interest is their captain, second baseman Kawabata. Kuramochi and Haruichi are fired up to face their rival fielder. Meanwhile, Kataoka calls Sawamura to his office after the coaches' meeting, and tells him to make the most of his experience from the first game.

The summer tournament is in full swing and Seido is playing their second game against Hachiya Oji and their skilled second baseman Kawabata. Furuya is the starting pitcher and has recovered nicely, throwing howling fastballs in the first inning. But Hachiya Oji has been expecting them, and third batter Kawabata hits one which nearly sails into near center field, but Haruchi and Kuramochi are there to stop it!

It's the top of the seventh inning in Seido's game against Hachiya Oji. Hachiya Oji has to score this inning or else the game will be called. Kawabata fought his way to a base, but it would be Hachiya Oji's last offensive. Seido's victory is imminent. After hearing Furuya say he'd get to play next game, Sawamura watches the game from the bench, the number one on his back. The story of these two players vying for the title of ace will continue.