You have your literature exams coming up very soon and your teacher decides to get pregnant and leave you at your most vulnerable. Not that it makes a difference; ignored by teachers and students for being too shy and quiet, you usually retreat to the back of the class where you do your own independent study. One day, in your usual regime, you're interrupted by a visit by the head of the school who introduces a very special substitute teacher. Joonmyun Seonsaeng-nim. Will he bring you from your shell and help you gain the companionship you've needed for a long time?