Kokoro, who is the manager of the basketball club, is taken advantage of because of her earnest and unyielding personality, and is made into a sex pet by the members. Surrounded by energetic basketball club members, she is violated almost every day. She can't resist the captain and her classmates who sexually harass her! They play with her pussy and cover the club room in urine. "The fact that you are our sex slave is a secret that only the basketball club members know..."