Shirt.

One of the boys got her shirt up to her neck before reality sunk in, sending her into a thrashing fit. Unsurprisingly, it hadn't occurred to her that thrashing around while draped over the top of the seat was a bad idea, she almost immediately fell off the seat into the aisle, pulling herself the rest of the way out of her shirt in the process, and leaving her stunned on the floor.

Her tiny A-cups were now out in plain view for everyone to see. The torment stopped for a moment as the boys stared at her budding breasts, and she scrambled into a crouch with her arms crossed over chest, sobbing uncontrollably.

A foot kicked her in the back, knocking her halfway into a seat, and she felt a cold hand slip into the back of the waistband of her panties. All thoughts of covering her breasts deserted her, and she grabbed the sides of her panties, frantically trying to keep them up.

What happens next?