Things My Tomboy Track Club Childhood Friend Can't Tell Anyone

Track teammates and childhood friends Hibiki and Mitsuru share unspoken mutual feelings. The next day Coach Iwaki blackmails Hibiki with footage of her masturbating during club activities, summons her to the men's restroom, forces her to strip and perform oral sex, and takes her virginity on the toilet while she resists yet begins to feel pleasure. He later forces her into sex and a creampie in a karaoke room next to her friends, then continues using her at school during PE, special training, and breaks, even having her wear a vibrator in class; after Mitsuru confronts Iwaki in the faculty room the abuse is kept quiet and Hibiki resumes ordinary life for weeks though her body stays hypersensitive and she masturbates. Two months later she voluntarily visits Iwaki's room in her track sports bra, submits again, is forced into bareback when condoms run out, and receives Mitsuru's call during climax. While still on the call she is penetrated in her sports bra; after it drops she changes into a cow costume and continues rough sex with creampies. She returns to school life without telling Mitsuru, yet admits she now wants both everyday life and the stimulation.