"When I turned a woman who seemed to have no sexual desire into a sex slave using a hypnosis app, she just became an incredibly humble/modest slave."

A boy who could only be mean to the girl he liked finally escalated his twisted feelings and resorted to a hypnosis app. He attempted to turn the female student council president into a sex slave using the hypnosis app so he could do as he pleased with her every night, but since the female student council president had no sexual desire, she only became a slave with extremely humble obedience.