Harry was more than a little intimidated by Hermione's suddenly domineering attitude, and he also was also aware that Ginny was a year younger. Did that mean that he would be safer in her company? He wasted no time at all, announcing his decision.
"Yes!" Ginny exclaimed, and Hermione actually seemed to look slightly disappointed at not being chosen. Wasn't she one of his best friends? She had intended to teach him a lesson for his remark about her feet, but she was doing all this for his protection. Hadn't she made that clear?
""He's all yours, Ginny" she added "I'll be back shortly, I just need to go... powder my nose." Ginny nodded at that; they both knew what 'powder my nose' really meant.
Ginny felt her timing couldn't have been better, she had plans for Harry that involved something other than her feet, and once Hermione was out of the room, she could put her boy where she really wanted him.
She slipped off her skirt for a moment, so she could work Harry into the right spot. Coming to stand in front of her bed, she gave Harry an ample view of her young, shapely, perfect backside, still covered by her white knickers.
"Erm, Ginny. Don't sit down, I'm here." he advised her.
Ginny giggled at that. If only he knew!
"I'm not about to sit on you, Harry" she pointed out "not yet, anyway. I do need to hide you though."
"Not yet?" What did Ginny mean by that?
She ignored his question, as she picked him up off her bed with one hand, pulling her knickers away from her backside with the other.
"In you go, Harry" she informed him, She then let him go, letting him fall inside her knickers so he came to rest against her butt flesh. She took a moment, to ensure he was in the right spot; she he would directly under her butt cheek when she sat down, then she allowed her knickers to snap back into place.
Harry suddenly felt the tightnes of her knickers holding him firmly against her shapely young butt cheek. He wast trapped; he couldn't move and as Ginny re-fitted her skirt, he found himself in total darkness. Ginny was certain that Hermione would have no clue exactly where Harry now was. She was going to have so much fun with him on the train!
Moments later, Hermione came into the room. "Have you hidden him?"
"Yes, Harry is in place" Ginny smiles "you'll never guess where."
"Hello Harry" Hermione called down to Ginny's feet.
Ginny decided not to correct her, just yet.
"There was a knock at the door. "Are you ready, girls?" Mrs Weasley called.
"Yes, mother." Ginny replied, eagerly. "Let's go!"
-----
They didn't make the journey to Kings Cross by car this time, but instead, the Weasley parents apparated them, perhaps as an extra security measure, since the Weasleys knew that the magical world was no longer safe. This suited Ginny just fine; she wouldn't be sitting on Harry on the back seat, but would instead save the surprise until the time was right.
Harry did not care for the experience of side-along apparition though, which was even more nauseating than usual, him being plastered to Ginny's butt as he was.
There were the usual farewells on the platform, then Ginny and Hermione boarded the train. The two girls found an empty compartment, and Hermione quickly claimed the first seat as Ginny moved to sit opposite her.
Ginny was smiling broadly as, for the first time since leaving home, she sat down. She sat quite quickly, and also firmly, savouring the moment as she felt her butt (and Harry) make contact with the seat and be squished beneath her. She knew that the shrinking spell would have strengthened him, keeping him safe, and alive, so she revelled in the occasion, wriggling her butt and grinding Harry into the seat of the train.
Harry had feared what might happen when Ginny eventually sat down, and now he knew. She was younger than him, but at his size, her weight was incredible, almost unbearable. Spell or not, he felt sure that he would be reduced to nothing more than a stain on her knickers if Ginny didn't get up immediately, she was like a young elephant.
Ginny didn't get up though, she relaxed and continued to sit on Harry as he train started to move, leaving the platform of Kings Cross Station behind as it started on its long journey to Hogwarts. Ginny looked out of the window and watched the City of London transform into countryside as the world passed by the window.
Underneath her butt, Harry knew none of this, all he knew was the colossus of a girl, who had claimed him as her seat.