Harry's heart sank as this giant girl he'd just met pointed her wand down at his miniscule body, the tip glowing with a blinding white light. Chills traveled down his spine as he realized she could probably annihilate him with the proper Hex. Luckily, Hermione was planning to get herself expelled before the school year even began, taking a different route.
She figured that if Harry wanted to be small, then she should do the polite thing and grant his wish, thinking of a spell she'd learned from a book the other day. Not batting an eye, Hermione sternly fixed her eyes on Harry and spoke the incantation.
"Diminuendo!" The giant witch in training said sternly with a hint of anger in her voice. The tip of her wand flared and quickly faded away when suddenly, Harry began to feel a strange yet somehow familiar sensation in his gut.
He hoped he was wrong, but one look up at Hermione and his suspicions were promptly confirmed. It was undeniable that in the blink of an eye, the frizzy-haired first year's size had doubled, plus interest. Big didn't begin to cover Granger's vast size. The most fitting word Harry could think of on the spot was enormous, or maybe even, gargantuan.
"There, a size befitting your actions! Perverted little bug!" Hermione bellowed, her voice ringing so loud that it sent shivers down Harry's spine.
Truthfully, Hermione could no longer see Harry standing at her full height. She had only made him only a centimeter tall, meaning that he was now small enough to fit inside of her belly button. On top of that, Harry's clothes still matched the Train's seat, making him invisible to the naked eye from above.
Because of this fact, Hermione had to lower her face to the train seat to talk down to Harry. She lowered herself slowly so that just her face hung about the shrunken 'Boy Who Lived' her giant face larger than any billboard.
"Don't think I was going to let you off so easily. Obviously, you were prepared to be sat on, at your former size, so let's see how you handle it at this size." Hermione scolded, the 'it' she was referring to being her buttocks. Justifying her punishment for this tiny pervert with her butt as a kind of poetic justice.
Then, as she had before, the young witch jumped to her full height, towering over Harry with her hands on her hips, looking down on him with a sense of superiority behind her eyes. Harry paused, frozen in fear by the sheer size of someone his own age.
Hermione, seeing no reason she should continue talking down to this ant-sized wizard, turned her back on him, placing her feet apart at shoulder length before moving to sit down. This action broke Harry out of his trance too late for it to matter, attempting to run away as he turned his back to the falling Hermione. Unable to watch as she flipped her skirt to assure that Harry didn't escape even a single millimeter of her humongous hindquarters.
Harry quickly rolled over as Hermione's body blocked out the surrounding light, shadows eclipsing his entire world as she fell towards him. The last thing he saw was her black panties-clad butt racing towards him, then, crushing darkness. At that moment, Harry was lost to the world somewhere underneath Hermione's left butt-cheek, even she couldn't feel where he was, her panties acting as insolation, forming a barrier between them.
However, the same was not true for Harry, he was still stuck between her Panties and the train cushion, but he could definitely feel Hermione on top of him. She must have weighed more than 3,000 pounds, if her skin wasn't so soft Harry's body would have been obliterated the moment she sat down.
Each of her cheeks was twice the size of the Dursleys house, and the fact that they were constantly in motion do in part to the train's momentum, rolling over the tracks, causing her body to shift on top of him every couple of seconds.
What will Hermione do next?
1. Hermione forces Harry to endure the rest of the ride under her rear, as the train travels over bridges, mountain ranges, and finally water before they can travel by boat to reach the Castle.
2. Hermione misses feeling Harry underneath her and moves him closer to her butt inside her underwear to better feel him against her skin before sitting back down.
3. Hermione bounces on Harry a few time to get her points across, standing up only to talk down to Harry and berate him before quickly bouncing her butt down hard on top of his puny body, before finally resolving to turn him back to normal size. Warning him that she would be so nice next time.