It is Kotori Sakuraba's first day as your new homeroom professor. Within a few hours, she has already suffered a series of 'embarrassing' incidents in front of the class: her shirt button popped off to vulgarly reveal her cleavage, followed by a stumble with a trajectory so flawless she fell directly onto you.

While the other male students make a scene and turn her into a fantasy, your responds coldly, noticing that these coincidences are far too convenient. After classes end and the room empties, you confronts Kotori, stating that her fake clumsiness doesn't fool you. Realizing her cover is blown on day one, a flustered Kotori locks you inside the classroom.

Tittle: Yakeni Azatoi Atarashī Sensei ni Hitomebore?