At school

As Marinette rushed towards class, trying to get that dream out of her head, she finally noticed just why she was feeling off. Why her breasts seemed to sway a bit more with every step, and why she felt a slightly rough feeling around her hip. 'Am I not wearing any underwear?!' Discreetly, Marinette scratched her shoulder to check for a bra strap, one that she didn't find. 'Fuck!' She screamed in her head, praying to whatever god is out there that nobody would find out.

As she sat down in class, a new problem made itself known. The seam of her pants, pushing itself into somewhere it never touched before. With every minor shift, she felt the fabric rub against her slit, at some points even slightly entering her most private of places. It was, as one would expect, extremely distracting for her.

Eventually, Marinette started getting a little too distracted from the feeling of the denim. Feeling somewhat ****, and glad that she sat alone today due to Alya being sick, the secret superhero quietly opened up her fly. While this did expose her moistening pussy, it also took away the pressure it was feeling. Yet, this didn't alleviate the internal pressure the girl started to feel.

Before she knew it, her pen started drifting towards the opening in her pants. 'What am I doing?!' The more rational part of Marinette screamed in her head. Unfortunately for her, the horny part decided to take the wheel, having become more and more powerful due to Marinette's unintentional streak and the current situation reminding her of the wet dream she had last night.

Before Marinette could think better of it, she inserted her pen through the open fly and straight into her wet pussy. Stifling a gasp, the girl continued pushing it in, doing whatever she could to not get caught. And while one part of Marinette begged her hand to stop moving the pen in and out, her horny side could only think of how she was completely naked in this very building just last night, and how she got fondled while fully naked in public in her dream.

Then, the bell rang, pulling Marinette out of her thoughts. Thinking quickly, the girl pulled her fly up again, just in time before Rose walked up to her. "Hey Marinette! Me and Juleka were thinking to head out with the girls, wanna join with?"

"Ah, no thanks girls. I've got to finish a commission first, you know?" Marinette declined, making an excuse on the fly. With the situation that was going on in her pants right now, she did not want to go anywhere but home.

"Oh, okay!" Rose said, cheerful as ever. "See you tomorrow!"

Marinette then started putting her stuff in her bag, trying to find an opportunity to get the pen out of her folds without raising suspicion. Unfortunately, that didn't happen, so the girl was **** to leave the classroom with the tool rubbing against her walls with every step she took.