Boarding school for criminals

Silas is a young teacher, 20 years old, short in stature and somewhat thin. He is very kind to the students, and they love him. This leads to him being hated by the supervisors, who try to bully or humiliate him whenever they can. Silas remains a good teacher even though he is afraid to interact with the supervisors, coordinators, or the principal.

Matthew: the oldest and the president of the student council, he is tall, elegant, and intellectual. Very dominant.
Isaac: Vice President of the Council, is bold and reckless, but too intelligent.
lyn: a girl
Yissie: girl
Hiro: boy, the youngest on the council and the most spoiled

Dominic: a 19-year-old boy, tall, with black hair, white skin, long fingers, stoic, mysterious, and distant. He is gay. He was committed to this place because his parents saw him kissing another boy; they believe it's necessary for him to be committed. Dominic loves to draw. He is attractive.
Lukas: a 19-year-old boy, tall, bisexual, is a thug. Attractive.
Sam: a 17-year-old otaku boy, weird but attractive... he's bisexual.
Lia: She's an 18-year-old girl, she's heterosexual, and an expert thief.
Stephanie: a 17-year-old girl who is extroverted, disobedient, and troubled. She is bisexual.
Leo: a drug addict

This boarding school is visually stunning, with castle-like buildings and abundant botanical gardens, but the teachers and supervisors mistreat the students for being troublemakers. They call it a "delinquent boarding school." There are many supervisors and teachers, and every single one of them is awful.