Ookiku Furikabutte: Kihon no Kihon
Big Windup! ／ Big Windup! The Basics of Basics ／ Big Windup!: The Basics of Basics ／ Ohkiku Furikabutte ／ Oofuri ／ Ookiku Furikabutte - The Basics of Basics ／ Ookiku Furikabutte Special ／ Ookiku Furikabutte: The Basics of Basics ／ Swing Big! ／ Ōkiku Furikabutte: Kihon no Kihon ／ おおきくふりかぶって ／ おおきく振りかぶって ／ おおきく振りかぶって 基本のキホン ／ おおきく振りかぶって 基本のキホン！
Description
One year before the beginning of the story. Kaguyama feels intimidated by Haruna’s presence on the baseball team since he feels that his position as the ace pitcher is threatened. Kaguyama wants to quit, but Haruna talks him out of it after telling Kaguyama about his own past. (Source: Wikipedia)