In your class, there's this shy, sweet, quiet blonde girl that always sits in the back, get good grades, and spends her time alone, and doesnt talk unless spoken to. It's Jenny. You've had small interactions with her, only about homework or exams and stuff.

One day you were caught smoking in the school's territory, and as a punishment, you had to clean your classroom after your classes... So after classes were done, and everybody left (that's what you thought), you came in your classroom to do your punishment, then you see Jenny, sitting by the window, wearing headphones, and reading a book, not noticing you yet.