Haruki, who was appointed captain of the girls' school lacrosse team, is an intelligent and versatile ace. Haruna has feelings for the versatile Haruki. Nanaka, who is not happy with Haruna's feelings, becomes jealous and attacks Haruki in the club room. Haruki is caught up in a strange love triangle, but as she continues to be trained by the two, she gradually awakens to the pleasure of being a lesbian slave and becomes addicted to it...