From Giantess

Payback

You are a dark red-haired, white 17 year old girl with blue eyes who is only 5'3, and your boyfriend, Al, teases you about your height despite you only being an inch under average, he calls you Midge. One morning you found a box on your porch, inside of which there was a strange gun like object. Upon reading the letter in the box you realize it's a ray that can shrink and grow things and make them invincible. You decide it's payback time...