Mistress Stella and her friends had endured a lot of mistreatment from this teacher. They did not like how he treated them because they had a feeling he was always unfair to them. They endured it and tried their best not to antagonize him so that they could graduate without any issues. And once they did, the mistresses revenged by torturing him. They slapped the shit out of him knowing there was nothing he could do about it.