Even Though It's College

A play between Rei and Nozomi.

Rei Serizawa, a college professor.
Nozomi Hayama, an undergraduate student.

These two are actually in a physical relationship.

Rei turns the body of Nozomi, who is smart but physically immature, into an adult's.

During class they are professor and student, but once class is over, they have an adult relationship.

Nozomi, a smart, quiet, and excellent student, gradually has her body developed and becomes a pervert.

That kind of story.