Excuse yourself from the class and follow her
From Create Your Own Story
You follow Tina to the girl's locker room, and she leads you into one of the showers. The place is completely empty. She looks up at you shyly.
"I've always wondered what It'd be like to fuck you." She says, leaning into you, "Your breasts for some reason leave me in a trance every time we're in class together."
Your mind goes back to previous classes when you would notice Tina staring blankly at your breasts, now with her hands clutching both firmly.
"I-I just want to know how they'd look without the bra."
You feel immensely turned on and kiss her. She pushes you against the wall and begin to pull off your clothes. You let her, your hands wandering under her shirt.