Because of the legend left by Tatsuya Uesugi, Meisei Academy High School was well-known for their strong baseball team. But 26 years after their glory, the team has not been able to keep their record and has since lost their fame. Two stepbrothers, Souichirou and Touma Tachibana, aim to revive of the once-strong Meisei Academy baseball team and enter the National High School Baseball Championship. Souichirou and Touma are second years in Meisei Academy Middle School. Both boys are talented baseball players. Souichirou has shown excellent skill as a catcher and batter. Though having an extraordinary skill as a pitcher, Touma no longer pitches due to a certain reason. Once the two enter high school, they pair as a battery and aim to enter the National High School Baseball Championship!
30 years ago, Meisei High School's baseball team won the much sought after Koshien Tournament, but haven't come close since. As the new school year at Meisei Junior High School begins, brothers Touma and Souichirou Tachibana start practicing in secret.
Otomi adopts a dog and names him Punch, as the Meisei baseball team debates who should be the club's ace pitcher.
The Meisei Junior High team progresses through the prelims of the national juniors as Souichirou and Touma begin their battery relationship.
To everyone's surprise, Daisuke pitches a whole winning game despite only having practiced with the team for an hour. The Meisei team goes to the Tokyo Tournament, but Daisuke doesn't show up until the game is well under way.
Meisei loses their match to Seinan after Nikaidou has a bad inning. Nishimura, Seinan's pitcher, tries to convince the Tachibana brothers to transfer to his team.
The mystery of Daisuke's odd practice attendance pattern is revealed. The new season brings changes to the Meisei baseball team, including a new Manager!
A big storm blows in sending everyone running for cover, and Nan reminisces about his near-death experience. Souichirou meets Hiroki Mita, a star player from another school and Arisa's big brother.
Meisei and Toushu play a tense practice game. Arisa acts like a jerk, and both Touma and Souichirou show their skill as players.
All the boys love Otomi. Touma gets a letter from Haruka, inviting him on “a walk.” They travel for hours to solve a riddle, then get stuck in the middle of nowhere. While everyone else waits at the Tachibana residence, Ooyama reveals that Haruka and Touma met when they were three, and she threw soda in his face.
Punch is feeling under the weather. Ooyama learns where Tou picked up his pitching skills. The history of the Tachibana family and Meisei’s number 1 jersey is revealed.
For info on the history of the Meisei High School Baseball Club, Ramen Dragon is the place to be. Sou and Otomi's ties to the team go back farther than they knew.
Meisei prepares for their game against Kenjo, but will Haruka's observations be enough to help the Tachibana brothers lead their team to victory?
Touma puts the first run on the board for Meisei, but Kenjo’s star slugger Akai doesn’t intend to let it go unanswered.
It’s the bottom of the eighth, and Meisei is down by one. Will their dream of reaching Koshien once again be crushed in the first round of the East Tokyo Tournament?
Haruka scouts out Meisei’s next rival: Sankou High School. Meanwhile, Akai comes to an important realization.
Personalities collide after the team’s manager sends Souichirou and Haruka to scout out the competition.
Otomi spends the rainy day bowling, while her brothers try to figure out whether or not she's on a date!
With Sou and Tou powering the team through the early rounds of the tournament, Meisei's story draws fans from far and wide. Ryou learns that his family and Otomi’s are more alike than he knew.
Nobody expected Meisei to reach the quarterfinals – not even their manager. With Touma resting his arm out in left field, can the bullpen carry the team against the hard-hitting offense of Kaiou Nishi?
Meisei's path to Koshien is in peril as they face off against Kaiou Nishi. Do they have the skill—and the luck—to survive to the semifinals?
Now comes the highly anticipated semifinal match between Meisei and Toushu! The rising rookie battery of Touma and Souichiro faces off once more against the unshakeable prodigy, Hiroki Mita, in a tense pitchers' duel with the tournament on the line.
Six innings in, the semifinal match between Meisei and Toushu remains scoreless. Under the burning sun and the pressure of the crowd, which team's star pitcher will reach his limit first?
Meisei and Toushu's war of attrition has entered extra innings, neither pitcher allowing a single run. With Toushu playing in unfamiliar category, and Touma seemingly reaching a new level on the mound, will this be the year Meisei returns to Koshien?