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A camera has been placed under a pile of clothes to spy on this schoolgirl and her balloon. She starts off studying but thinks that since no one else is home yet, it would be a good time to play with a balloon, and herself. She pulls a balloon from her backpack and begins to inflate it, then stretches it across her body and rubs the neck on her pussy. As she continues to inflate it she slides her panties off and takes her boobs out of her shirt, and caresses herself as the balloon continues to grow. She rubs her pussy on the balloon more before it gets too big, then really gets into rubbing her pussy as it surprises her with a pop between breaths. This makes her cum really hard, then she promptly gets back to studying.