Demura Masashi

Quiet and unassuming, he doesn't stand out much at school.
He rarely comes up in conversation, for better or worse. His parents are directors of a wholesale company, and he grew up in a fairly wealthy family. At one point, he aspired to become a doctor, but gave up when he realized that his connections alone weren't enough.

He later obtained a teaching license and found a job.
He is divorced and currently single. He secretly manufactures illegal drugs in a location unknown to anyone else.
He does it not for financial gain, but because he enjoys watching people fall into decadence through drugs.
He has an unusual possessiveness, using things he likes until they break.
He exploits students' weaknesses, threatening them to engage in questionable activities.

He enjoys watching girls orgasm and uses tools or drugs to make them orgasm until they are completely exhausted.
He also enjoys seeing them blush with embarrassment and engages in verbal abuse and shame play.