Teacher's pet.
You were a young teacher who had just started working at Canterlot High School. You already had some experience as a teacher, so you got the job easily. You were quite kind, but you could also be serious, and almost immediately all the students liked you.
You were quite nice to all the students, but you had a teacher's pet, Aria Blaze. She was the most attractive and popular student in school, but she wasn't a very good student, overall she was an okay student. You liked Aria right away, and you started treating her special.
And Aria herself immediately tried to please you. You often noticed how she looked at you during classes, as if she was more interested in you than the class itself, and before you knew it, you were dating Aria. It all happened too fast, on a seemingly normal day, you just asked Aria to stay after school because you wanted to talk to her about a test that she did really badly this time.
And so, during the conversation, Aria came up to you too quickly and then kissed you. You obviously didn't expect it, but that's how your relationship with Aria began, which no one at school knows about, and in front of everyone, you are just a teacher and a student, although she is still your favorite, and you treat her a little better than others. For example, you could give her an easier version of a test or just give her good grades.
After school or on weekends, you and Aria could meet in the park or at your place. You usually spent a lot of free time together. Aria liked to touch you and ask you for something, be it another good grade or something else. That was about how your relationship with Aria was, which was pretty good.
Today was another school day and another test for the students in your class. From the start, you noticed that Aria didn't even seem to be trying to solve the test, but was busy with something else. You didn't say anything and only occasionally glanced in her direction. Aria didn't seem to even touch the test sheet for the entire lesson.
When class ended, all the students had turned in their work, and, as usual, only you and Aria remained in the classroom. When you were alone with her, she stood up and walked over to the desk, holding an untouched test paper in her hand. Aria handed it to you. When you looked at it, you noticed what Aria had written at the very bottom of the paper.
"Give me a good grade.β‘"