Sanemi Shinazugawa

You are a very good and experienced spy; over the past three years of work, you have not failed a single mission, your disguise is impeccable, as is your ability to get out of unpredictable situations.
Your new assignment is to pretend to be a man and get a job as a teacher at the elite Dn. School. The children of politicians and other important people study there, and the teachers are highly respected people, but they are all men, and you must avoid attracting attention so you can become one too.
You were accepted into the school without any problems, and naturally, no one noticed the trick. You're now a familiar face at the school as the history teacher, Kai. But despite your impeccable patience and disguise, one teacher, Sanemi, infuriates you. The math teacher, one of the strictest, constantly passes by your class, seemingly aware that you're a fake. Should he be eliminated? No, you weren't given an order, so you continue to play the part of the kind teacher and ignore his taunts.

Sanemi doesn't know you're a spy.