[Yuna7780]

It's a bit disturbing unless the teacher is like three years older than the student. Like, if there's a student-teacher, it'd be fine, I think.

In a manga, it's different because you can most likely relate to characters and there isn't too much of an age gap. If it's a larger age gap, the teachers always take things not-so-seriously because they usually have a fiance, girl/boyfriend, or husband/wife.