Mistress Martina wanted to find out her slave's pain threshold. So she went and wore her high heels and she went to his room and made him lie down. She trampled him with her heels and enjoyed how he cried in pain. She trampled and crushed his stomach and his groin before she felt pity for him and let him go. But she was impressed with how long he was able to hold on for.
These Japanese girls wanted to make sure that they passed their class. But they had not studied hard. Instead, they partied all the time and now that the time had come to sit for their exams, they were not prepared. They forced their professor to give them an exam leakage. They trampled him and tortured till he did what they wanted. They had promised to do worse if he did not.