Ace of the Diamond Act II

Game set. Eijun Sawamura, the pitcher of a novice junior high baseball team, meets with a bitter walk-off loss. For Sawamura, that became his last game in junior high, so he sets a new goal of going to the nationals in high school with his teammates. As he begins his hard quest on studying, a guest arrives unannounced. Her name is Rei Takashima, and she is the assistant director of the prestigious Seidou High School Baseball Team. Takashima invites Sawamura to Seidou after seeing his potential, but Sawamura's reply was far from what she had expected.

Sawamura gets himself into a baseball match against the 12th grade batter, Kiyokuni Azuma. Sawamura forms a battery with Kazuya Miyuki, the catcher carrying high hopes for Seidou. Sawamura loses confidence against Azuma, an opponent he's never faced, but Miyuki's lead slowly pulls out Sawamura's full potential. And then he throws his last pitch. After returning from Tokyo, Sawamaura is lost about his future, unable to forget his pitching with Miyuki. He wants to test his strength in Tokyo, but he can't betray his junior high teammates and leave them behind. Bewildered, his teammates approach him.

Sawamura is nervous being roomed with his older baseball teammates. However, their unexpectedly warm welcome makes him feel right at home. Next day, he feels too much at home, and ends up sleeping in for his first practice! There, he reunites with Miyuki who also overslept. Unfortunately, Miyuki's advice on resolving the situation only makes it worse. The head coach himself tells Sawamura that using him as a player is out of the question. However, recalling the messages from his teammates back home, he declares to the coach, "I came here to become the ace of this team!" So the head coach gives him a challenge.

Seidou High School faces off against Ichidai Third High School, the school that beat them last year. While their top-level offense rakes in runs, the ace Tanba isn't doing too hot. The game turns into a batting game. On the other hand, Sawamura is back at school, training by himself. During his training, Furuya, another first-year pitcher approaches him. Showing sympathy to Sawamura's peculiar training method, Furuya offers to play catch with him. Sawamura is in a cheery mood with Furuya's kindness, but the speed of Furuya's throws far exceeds his expectations.

A game between the first-years and the second and third-years is being held. While Sawamura worries about whether or not he can play, he chances upon the Head Coach in the bath. "I don't want to see anyone but me standing on the mound." The Head Coach gives Sawamura one more chance in response to his statement. On the day of the game, the second and third-years are playing with everything they have. The first-year team looks pale, but Sawamura is pumped for his first game. Sawamura seems to be full of energy, but perhaps it isn't being put to good use...

The scrim continues. Sawamura has finally based. It was thanks to the advice from Haruichi Kominato. As he steps into the batter's box, he declares to score a run. His batting turns out to be amazing. To answer the call, Sawamura sprints and makes it back to the plate. The first-year team gains momentum, but the Head Coach is ending the game mid way. However, he will let the game continue if the entire first-year team wants to keep playing. How will they respond?