Responses
http://www.mangago.me/read-manga/ano_kado_wo_magatta_tokoro/
The teacher here is just a substitute though but after their was relationship discovered the teacher worked at some prestigious uni where the student worked hard for.
The infirmary doctor is also friends with the teacher. I'm not sure of this is what you're looking for..
I'm looking for a teacher x student manga. They know each other in the street and the teacher didn't know that the seme was his student. So they started dating, but at some point the school realized that they are together, so they decided to separeted the two of them. Until the seme finish high school and went to the college that the teacher started working. Thaks