Yes, I know this may seem odd, but I also will allow Japanese 'schoolboys' (if they exist?)
So, here is my idea on the plot/story.
My character is the headmistress/somehow owns the school your character attends. While you one day arrive for a late 'meeting' after class about your grades, you would discover that your head mistress/teacher/whatever has been hiding some sexual craving for you. <--- I am willing to alter/change this around if requested. :)
We can discuss details on PM, please.
So thanks for reading, and hope you find some sort of interest in this.