Having just retired, Sawamura Eijun returns to his childhood, carrying a wealth of baseball knowledge as if it were second nature. Starting his most scientific training ahead of time, just how far can Sawamura Eijun go? From Akagi Middle School to the Major Leagues, this story records Sawamura Eijun’s love and dedication to baseball. No matter how many times he starts over, Sawamura Eijun will always continue playing baseball.

I saw a baseball magazine on the table:

Qingdao? Eastern Qing Kingdom? I've traveled to an anime!

The information about his own body also entered his mind:

Ryuzaki Gunji, 15, outfielder and fourth batter for the Marugame Little League team...

In that case, I'll make up for the regret the third-year seniors had when they lost to Inami this summer. I'm going to become a regular member of Seidou and make it to Koshien!!