In the summer before Ren Mihashi makes his high school baseball debut, another drama is playing out at Musashino High. The short-statured Naoto Kaguyama feels threatened by freshman pitcher Motoki Haruna after seeing how seriously he trains. Afraid that Haruna will take his place on the mound, Kaguyama tries to understand why such a devoted player came to their low-ranked school, and how to build their team into one more befitting of a player of Haruna's skill. [Written by MAL Rewrite]

Ookiku Furikabutte: Kihon no Kihon originally aired only on Japanese TV networks BS-TBS and MBS TV's "Anime Shower" slot on August 19, 2007. The special was released on DVD by Funimation Entertainment on September 29, 2009.