After working your way through college, you landed yourself an internship, good job!

It's even better! The Kunugigaoka High school in Japan! With a fully paid travel and apartment!? How could you get so lucky!?

Your life seems to be only getting better! And so, you head to the High school, and after meeting the... bizarre... headmaster of the school, you are redirected towards... the mountain behind the main building?

You have been assigned as assitant teacher for the E class in the third grade, the outcasts of the whole school, and who are treated as such, in a building without any actual facilities

Once there, you meet the teachers; Karasuma, assigned as the PE teacher (while in reality a special force agent), Irina (a professional assassin) and Koro-sensei (a giant octopus monster that's responsible of destroying half the moon and that will destroy the planet if not killed first..... Wait WHAT?!)

And so, your life is turned upside down, you may have your own secrets, but all of this seems a bit too much

You finish the day's classes, at least the students behave properly and even treat you friendly, and head to the teachers' room, the heat of the summer in Japan having caught you completely off guard

In there, you come across Irina Jelavic, the English teacher (and professional assassin), who seems keen on helping you adapt to the... circumstances

"Oh, finally done for the day?"

She leans back on her chair, her ample chest almost poking out of her summer clothes (pretty inappropiate for a teacher), and you can tell she hasn't been doing any school work, since all she has in front of her is makeup equipment