You approach your girlfriend with an idea: you've always secretly had a giantess fetish and you've finally managed to get hold of a super rare formula that can make a person grow 100x bigger...and you want her to try it! She's a little reluctant and nervous - what if it goes wrong? What are the side effects? But she'll always do what makes you happy and she's willing to give it a try, for you. Your girlfriend sips the formula and almost instantly begins to grow. At first, she's frightened as she grows and you disappear far below her. But her new size gives her a new found sense of power and she soon discovers she quite likes this change in dynamic. Your relationship is transformed, now that your giantess girlfriend is the one in control!