Why the Hell are You Here, Teacher!?

Ichirou Satou, a sophomore in high school, has always been a typical person—at least, until he gets into some unusual events with Kana "The Demon" Kojima, his teacher. Satou's Japanese language instructor, Kojima, has a reputation for being so brutal that even school bullies submit to her authority. One fateful day, Satou and Kojima enjoy an intimate meeting that causes Satou's imagination to run wild for days after they meet. This causes things to escalate. The everyday interactions between Satou and his teacher are followed in Nande Koko ni Sensei ga as they continue to meet in the same settings and become closer with each meeting.