It turns out my girlfriend was perfectly accepting of my new busty female form. Heck, sometimes I couldn’t pull her away! It turned out that not only was she bisexual, she happened to discover she was breast-obsessed, and her being equally busty meant was was in a tit-filled wonderland.
The Shrinkening changed all that.
It started with her. She lost her D-cup breasts in the span of an afternoon, leaving her totally flat-chested. But she didn’t mind TOO much, since she still had me. Well, she still had me for another day. The next morning I woke up, noticing my night shirt felt roomier than it had the night before. The reason for that was soon made very clear: I had become as flat as my girlfriend.
I was okay with it. Sure, I was upset that I had lost my favorite part of my new body, but I could live with it. My girlfriend, on the other hand, was less fine with our changes. She left me that day, claiming that while she could be with a woman, it would have to be one bustier than me.
From what the news reports said, she was going to be searching for quite a while.

“No don’t come in!” I shouted, quickly clutching my towel to my rapidly shrinking bust, as I heard Alyssa (she refused to choose a male name to better suit her “new” features) turning the doorknob to the bathroom.
“But the baby’s hungry!” he whined. “And thanks to you I don’t even have the right parts to feed her.
“Ugh, fine, you can come in,” I said, dropping the towel to reveal my newly flattened chest, my nipples still dark and hard atop it. “But thanks to this whole Shrinkening thing, I don’t either…”

“I don’t know what the fuck you think you’re doing, but it’s obviously not working,” my girlfriend said angrily, and I could see why she was pissed: her tits were shrinking by the second. This morning she had had F-cups, but now they were barely C-cups.
“I mean look at you! You’re still barely an inch tall!” she mocked as her breasts went from being nothing less than tits, to just plain old boobs. She was wrong though: I wasn’t doing anything to make this happen, and I was rather disappointed in the results. Now not only am I tiny, but now I can’t even play on my girlfriend’s huge jugs!
Speaking of those, she was now probably smaller than a B-cup, if that “B” stood for “barely boobs”. Her hands flew to her chest as the last of her breasts faded, and the only things left on her chest were her nipples, and the tan lines from her bikini.
“Why would you do this?!” she shouted. I didn’t even bother explaining: I knew it would be pointless. “Fine, if you won’t tell me, then jerk yourself off again. Even if I don’t get my tits back, you’ll be so teeny I’ll need a microscope to fine you.” She walked over to me, and threatened to squish me, so I did as I was told. I lost a few more millimeters of height, but she gained no more boob.
“Do it again,” she said threateningly, and I obeyed. I got even smaller, but her chest remained just as flat.
“Again.”