|The starting point of 'Punished by your teacher' pretty much starts off with the protagonist being punished by their teacher.
The story's creator seems lenient enough to let the chapters veer off on their own path, as long as it involves a teacher starting the punishment.
Quite a few chapters deal with the Teacher feminizing the protagonist, Others make the protagonist become a body part of the teacher or even be changed into her clothes.
The parts that seem to veer away from punishment are the chapters that the protagonist becomes the teacher's new child. But even they involve the teacher punishing the protagonist.
I personally like the chapters where the protagonist gets dominated by the various women at the school. Well, As long as they aren't too cruel. There's a fine line between punishment and torture.