(Don't add chapters past this one, I'm working on it.)
You are still taking a nap when the girl awakes you. You grunt and ask what is happening. "Man, I'm not sure but I think you might have a problem". "Stop telling crap, and leave me alone !" you answer loudly. "No I'm sure, stand up !". This is starting to piss you off, so you get up and stand still in front of the girl.
"Well, you see there's no problem."
"Before, I had your neck in front of me, now it's your mouth."
"Pfff it has always been like that." You turn yourself back and open your backpack.
"Maybe I just imagined it..." she ends up saying.
You tell the girl you will search for something more interesting in the lab. After one hour looking for another machine, you come back to her.
"Dude, I'm sure there is something. Now we are at eye-level. You are shrinking !" the girl yells.
Oh my god. The shrinking is getting faster, and you can almost see it in real time. From 5'11" you lost enough inches to be smaller than the 5'6" girl ! Your eyes pass before her nose, then it's her mouth, her neck ! "You're so small now ! But I'm afraid it won't stop here."
You can now see her two breasts just in front of your eyes, and you start panicking when she sticks herself to you, and you are still shrinking. It's really embarassing when you arrive to her panties-level, you can't see her face because of the two globes above you ! You see pass her long legs, it's terrifying, you're not even 1 feet tall !
Then you hear "I'm going to take you in my hand don't move !" Now that she is 10 times taller than you it's easy for her to raise you. You can stand up easily in her hand. You feel that the shrinking is slower, and you stabilize at 1 inche tall.
The girl, amazed, talk to you "I can't believe it... My finger is longer than you, and only 1 finger is stronger than you !" the girl giggles. "So, little man, what could I do with you...". You know you should be terrified, but in fact it's... exciting.
You can't hide it to the girl, and she laughs. "Ooooh, I can see that I have my little effect on you ! What does this panty hide...?" She comes with her finger, and starts tickling you ! Your erection is getting stronger... Her fingernail touching you is very stimulating. You blush !
"There are a lot of possibilities you know... and if I start by amusing myself a little ?" She looks at you with her big blue eyes, and catch you with two fingers. you don't know what she want to do, but you see her chest getting closer. You understand what is her desire. "The thing whose every man is dreaming of ! prepare yourself, the landing will be a bit brutal..." she drops you over her gigantic breasts, and you dive in between them. You are in the darkness, but you can still feel the warmth and the smoothness of her skin.
"So, do you like it down there ? And if I pushed you more deeper..." say her voice from above. You sense her finger pushing you, and you fall on her bra tissue, on her tit. You get an idea, and start to stir yourself on her tit. She moans and her fingers go down naturally to reach her panties, and her pussy. She starts masturbating, so you lick her tit, and it continues to harden. She moans more, and picks you up to first bring you to her mouth.
She catch you with her tongue, and licks you, playing with your body. Then, feeling she is approaching the orgasm, she quick take you out, and carries you to her vagina. Small as you are, she can easily make you go inside, pushing with her nail. You dive in a sea of fluids, and when she reaches her orgasm, she moans very loud and you are sent in all directions. Her vagina presses you very strong, and you lose consciousness.
And then it's the black. You wake up maybe, 2 or 3 hour later ? "Ahh, finally ! My favourite sextoy !" you hear. You look up, and you see her huge face. "Well slept honey ? We have plenty of time today ! Where can we go ?". She grabs you and puts you in her bag.