Seiryou Lez Gakuen Rikujoubu Shitsunai de no Ingyaku Katsudou

Seiryou Girls School is renowned for its programs.
Kana Hamaguchi moved to the city from her little country town so she could attend, and made quick friends with Emi Takenaka.
Kana was into physical activities, and Emi was obsessed with getting top marks in all subjects. When Emi joined an obscene special course to this end, she was completely overpowered. Her only hope is that Kana will extract her.
But the things that Kana will face in the the track and field clubhouse...

[from DLSite English]