ターフのカノジョは競馬界が繁栄を遂げ、法改正によって競馬が当たり前となった世界で競馬道に生きる少女たちの日常と競馬の騎乗から予想まで、新たな世界を作り出した競馬界の物語。 この物語は童夢志保視点の物語です。

Shizuku Mihara, who attends Ozashiki Gakuen High School, has a strange encounter at her grandpa's house during the summer vacation before her exam. Shizuku wanted to go to the literature department, but due to her family lineage, she enrolled in the horse racing department of the parlor school. Shizuku, whose grades haven't improved much, looks up to Primrose and Shiho Dome, who are the two top girls in the class. The story of high school girls who strive to win the ``BKCC Kotori Ogami Festival (GI)'' race, which decides the top of officially sanctioned school horse racing in Japan.