You were just climaxing as the buzzer went off, your first female orgasm. Your vagina clamps down on the fingers you had slipped inside yourself and you shudder and moan in pleasure.
It takes a moment for the orgasm to subside, and you're lost in the experience. It's very recognizable as a orgasm, the building tension and release is there, but it's also quite different. The pleasure is more spread out, and washes over your body in waves, spreading from your clit. You want more, and feel like you could continue, you would but the buzzer indicating someone in the lobby want's your attention sounds again. It snaps your attention to the present.
You can still feel the warm wet feeling from your pussy, and you're body is still very decidedly in female mode, and buzzing with arousal. You don't feel fully satisfied, the empty feeling remains, part of you knowing that your plans with your girlfriend haven't changed from your native reality is anticipating getting rid of that empty feeling with her. The other part of you is terrified at the prospect.
You focus, and quickly set your bra back on straight and pull up your pants and underwear before heading to the panel near the door to let your girlfriend into the building so she can come up to your apartment.
The plan is that you'll have some lunch here, then hang out and at some point move to the bedroom. You spent the whole morning reading about the world before your little self exploration. With the fact that your body is a bit mode sticky and tends to stay in male or female mode for longer than average you're very concerned the choice of which role you'll be playing when things do move the bedroom is already made. Being a man in your native reality you're not sure you're prepared to be the one receiving.
You quickly head back to the bedroom to pull on a shirt before your girlfriend reaches your apartment door. As you do you can't help but notice just how tight it is around your bust. All your shirts do look like they're cut with accommodation for breasts, but yours are huge. They take up enough room that the shirt hem hangs noticeably higher on your front than the back, and the t-shirt is very much stretched tight across them. A problem your girlfriend has complained to you about many times, this version of you must be able to relate, you get to choose if a shirt fits well over your bust or the rest of your upper body.
You step into your bathroom to take another quick look at yourself, to makes sure you're presentable enough. The shirt is pulled tight across the gap between your breasts. You notice the neckline is lower than the same t-shirt in your native reality, it shows a hint of cleavage. The jeans you pulled on fit reasonably well, your hips seem to be the normal size for a man after his second puberty, if that fit is anything to go by. They feel different though, your expanded hips make the way the fabric pulls as you move different.
All your clothes feel strange, the bra, your shirt, your jeans, and underwear, it all fits differently with your altered shape. You can feel the empty space in the front of your underwear and jeans, left by your current female mode causing your penis and balls to be pulled into your body. The fabric of your underwear is loose in the crotch and you can see the lack of bulge in the front of your jeans. The bra band feels tight around your middle, but you're glad to have it lifting the weight of your bust off your shoulders and reducing the jiggle. The filling of your shirt being tight around your upper body bother's you a little, you prefer loose fits, and it changes how the fabric sits under your arms and on your shoulders.
You're broken out of your reverie by the sound of a knock on your apartment door. You head out, constantly aware of the changes, the way your clothing moves, your bust bounces, your hips slight sway, the empty space between your legs, and the wet, warm, empty feeling of lingering female arousal.
You open the door to your girlfriend, Crystal, exactly as you remember her from your native reality. Wavy blonde hair, blue eyes, tall enough that her eyes are nearly level with yours, exceptionally busty, wide hips, and an hourglass figure. She's carrying a bit of extra weight, but in all the right places. The only thing that is different is between her legs, you only glance, but it's enough to tell you that it is in fact there. Images of her on previous dates come to your mind, all from this reality, they all correspond to memories from your own reality, but you remember sometimes checking out the bulge. You even remember giving her a kiss and having it poke you as she got hard. You've seen the outline of it hard a few times, stealing glances when you got up after making out while watching a movie. She was so embarrassed the first time you politely pretended not to notice.
Her excited greeting and kiss pull you back to the present. Her arms wrap around you, your breasts press against hers and you return the kiss and embrace. It quickly becomes more than a simple hello kiss and her hands slide down your back to your ass and you can feel her cock stiffen against your body, sending a new thrill of arousal through you.
"Oh..." she exclaims. "I... mode switched!"
Being close to you and getting a little turned on triggered her body to go into the opposite mode to yours. "Oh... yeah... um... that's my fault..." You decide not try to hide the obvious.
She pulls away slightly looking at you, smiling. "Oh?"
Some information surfaces in your mind about the recent past of this realities version of you. "Yeah... I've been a little... hair trigger on the girl mode since I started birth control... and I just had a passing thought while getting ready and bam..." Both you and your girlfriend had started birth control for your female halves recently in anticipation of finally getting into each other's pants, and the alternate you really had been experiencing that as a side effect. Not quite as quick to girl as you made it sound, but it was a common enough side effect and should go away in a few more weeks.
"I see..." She looked a little uncertain. You found you knew that although she wasn't a virgin, she hadn't had sex since her second puberty, and neither had the alternate you. "So what's for lunch?"