Second year highschool student Ichirou Satou has at all times been an average individual—that’s, until he runs into some not-so-average situations together with his teacher, Kana “The Demon” Kojima. Kojima is Satou’s Japanese language teacher with a status for being so ruthless that even school delinquents bow right down to her. One fateful day, issues escalate when Satou runs into Kojima in the restroom, main them to share an intimate encounter that makes his creativeness run wild for days after.
Nande Koko ni Sensei ga? follows the every day lifetime of Satou and his teacher as they proceed to meet under similar circumstances, rising ever closer with every encounter.