Kainan's teacher

"You should enroll if you're serious about going to an art university."

- Kainan's teacher to Senpai

An unnamed man is a background character of the Don't Toy With Me, Miss Nagatoro manga series. He is a private teacher at Kainan Art Preparation School and its supervisor alongside an assistant.

His name is currently unknown.

Appearance
The man is a tall, thin, somewhat slim-bodied middle age man with medium-lenght straight brown hair with bangs pinned to both sides of his face. He has a fair compexion, well-defined nose and square chin with a slight goatee. He is short-sighted and always wears a pair of horn-rimmed glasses that obscure his eyes.

Clothes-wise, his outfit always includes simple shirts, jeans or pants cut below the knee, while is footwears are usually sandals or loafers.

Personality
He is a very patient, relaxed, calm and easy going individual, with a liking for joking and inventing names that are often teased by his students. The man seem to be a very good teacher, always full of advice both practical and personal to the kids attending Kainan.

Early life
The man was born in, , where he became a private teacher and started to work as supervisor at Kainan Art Preparation School.

He was likely Sana Sunomiya's teacher when she studied at the cram school during her last year of high school to enter.

Nude modeling arc
When Senpai went to a class trial for Kainan Art Preparation School in order to get ready for entering an art school, he gave him some advices about his work and suggested him to enroll to their summer courses if the boy is serious about it. Later, when Senpai officially enrolled the school, the teacher complimented him for how much he had gotten better, to the point of asking the boy what changed, to which he thought back at Nagatoro's nude painting he made the previous day and replied that he started "enjoy drawing".

Kainan's Big Four
After setting up a mock exam for his students on August 26th, he complimented the result of an oil painting session from the school's top students - Aihara, Hashimoto and Machida - whom he nicnkamed the "Triumvirate", saying he was looking forward for their results at the exams. Then on the following session, due to Senpai's art improvement, he and his assistant added the boy at the trio renamig them the "Big Four".

Later that evening the person he ask to model for the rough sketch portion of the first day of mock exam inform him of being unaveilable due to a sudden emergency; after troubling themselves with searching for a replacement, he and his assistant asked Nagatoro to be the sobstitute model, which the latter gladly accept - despite being the day before her tournament - saying it woldn't be her first time doing it. When Senpai became worried they intended the girl to pose in the nude, he pointed out it would be a crime as she was underage; causing a reaction in both Senpai and Nagatoro that made evident they previously did it, causing Machida to snap and proposing a bet to the boy having the one who lose posing nude for the winner. To whom he simply commented it would be "ok" due to them both being legally adults.

On the following day, being August 26th, he was seen supervising the mock exam alongside his assistant until its end. After which, he complimented Aihara for getting the first place and Senpai for his great leaps.

Trivia

 * Given that he seem to be as tall as Senpai (176 cm) his height could be estimated as the same.
 * He is the adult characters with the most "page time" and speaking lines in the manga.