She manages to get to school without a serious mishap

Jessica continued her pell-mell dash towards school, feeling the clock ticking against her with every step. With how focused she was on running, she hadn't noticed just how badly the forceful movements of her breasts were straining the topmost button she could do up, which was just between her breasts. Its' threads were slowly giving way, unable to resist the constant shifting of her large breasts against it. Jessica raced onwards, heedless of this insidious threat to her modesty.

As she rounded the final corner to school, fate intervened. Her flats, already ill-suited to running, had been made slicker by sweat. As she rounded that turn, her left flat slipped forward a few inches, her bare heel striking hard concrete. Surprised, Jessica dragged her foot back into her shoe, stumbling a bit as she did so. The sudden shift in momentum made her breasts slam forward against her blouse, and with a faint ping the button between her breasts finally popped off.

Without that button, the entirety of her amazing cleavage was on display, as the next button was above her navel. Jessica had been so distracted trying to keep her shoe on that she completely missed the button flying off her blouse. As she resumed her dash up the sidewalk towards her school, her breasts bounced and wobbled beneath her now-looser blouse. Without that extra bit of restraint from the missing button, their movements brought them closer and closer to freedom.

She threw herself into one final dash towards the doors. As she sprinted towards the doors, she could hear the bells ringing, and see the last of the students heading in the doors. Her breasts had crept precariously close to the edges of her blouse during the run, and as she approached the doors, her left one finally bounced free of her blouse, its' hard nipple standing proudly atop the quivering peak of her breast.

Jessica finally slowed to a walk just before the doors, gasping for breath. She **** herself to keep walking, as she was going to just barely make it to class on time.