It was narcissistic, Sean knew, to spend so much time posing in front of the mirror, but she couldn’t help it. She looked amazing.

The high heels, the black stockings, the sheer panties, and most of all the black corset that was showing off the girls so nicely. Ava had styled her messy black and blue hair into a kind of rockabilly quiff; it wasn’t what she would have chosen, but it did look great, she admitted to herself.

“How do I look?” she primped.

“Hot. Ridiculously hot,” Ava laughed. She snapped another picture on her phone. “Mel is definitely going to want to see this.”

Melanie was Sean’s girlfriend. She was also, thanks to a handy Venn machine, at present her corset.

Of course, there was also the fact that Sean was usually Melanie’s boyfriend. The Venn machine had also taken care of that.

Ava poured some more wine, handing a glass to Sean. With Melanie craving a day as underwear, Ava had invited Sean to spend the night using Melanie’s bedroom. She was glad; she was getting to know Sean, and he was proving good company. Especially as a woman.

He’d seemed a little intimidated by her at first. Maybe it was her cropped hair, or her combat boots. Or maybe it was the fact that when they’d first met, Ava had been transformed into a sex toy.

Ava found herself amused by Sean’s primping. “You’re really enjoying being a girl, aren’t you?”

“What’s not to like?” Sean grinned. “Particularly this body. So happy I could raid your wardrobe …”

“We’re going to have to go out to the Lounge to show you off,” Ava said. “Maybe Wednesday night? When Melanie’s not busy being a corset?”

“That would be great! But would you want to come with us as a woman … or as a dress?”

“Mmm, that last one is definitely tempting …” Ava sighed thoughtfully.

They finished the bottle and tottered off to their beds.

*
Sean’s hopes of a late morning lie-in were dashed when Melanie changed back to her human form a little past eight, loudly demanding sex. By that time he’d also reverted to being male, and was happy to oblige.

“How was being a corset?” Sean asked as they lay snuggled together.

“Dreamy,” sighed Melanie, a faraway look in her eyes. “Being such a sexy piece of lingerie made me feel so good. And I know you enjoyed wearing me! I could feel you rubbing me constantly!”

“Yeah, I think I’d enjoy being a corset too. Or stockings.”

“Oh yeah, I’ve been stockings and they’re the best! Plus you’re divided into two, which is amazing. God, I want to be so many things - latex leggings, a wedding dress, boy’s clothes …” Melanie trailed off. Something had occurred to her. Something so obvious she couldn’t believe she hadn’t thought of it before.

“You’ve got something in mind,” Sean said as she cackled with glee.

“I sure have. And you’re going to really enjoy it. When are we going out next?”

“Uh, actually, Ava suggested a trip to the Lounge on Wednesday.”

“Venn night? Perfect.” More cackling. “Absolutely perfect.”

*
Sean had to work nights at his bookstore job, so he didn’t see much of Melanie and Ava before Wednesday. At 4pm he received a text from Melanie imploring him to meet her “at the usual place” at seven.

The usual place meant the Venn machines at the local mall, where he greeted Melanie dead on time.

“Ready, lover?” Melanie grinned as she set the duration on the Venn machine for 24 hours.

“As ready as I’m going to be,” said Sean. “You want me to be a girl, right?”

“Absolutely. But this time, I’m going to be a boy.”

Their smiles were broad as they entered the machine.

At the interface, they worked together to refine their new forms, although both worked in a surprise or two as well. Then they hit the green button that changed them.

Outside the machine, they checked each other out. By now Sean’s female form was familiar - longer hair but the same messy black and blue, and small high breasts - but Melanie had never been a guy before and could hardy keep her hands off herself. Her clothes had also been changed, from jeans and T-shirt to a black muscle shirt and leather pants that fit tightly over her …

Oh, my.

“I didn’t think I made you that big,” Sean said.

“I don’t know how big I am,” Melanie said. Then she did a double-take. “Hey, my voice!”

“Yeah, you sound a lot less like yourself as a man that I do as a woman.”

Melanie readjusted himself yet again. “Damn, this is hard to get used to. Let’s get back to the apartment, I wanna see what’s down there.”

*
They made straight for Melanie’s bedroom, where they both stripped. As she expected, Sean looked almost exactly like she had on the weekend, except for one thing.

“You shaved me!” she exclaimed. “I’m bald there!”

“Yup,” grinned Mel. “My preference. And hey, what’s this thing?”

“That, babe, is a Prince Albert.”

“Well, that’s going to be interesting.”

Sean poked her head outside the door. “Hey, where’s Ava?”

“That’s the next surprise. She’s in her room - in a manner of speaking …”

Laid out on Ava’s bed was a beautiful - and short - black leather dress. Piled next to it were a pair of black stockings, a bra and G-string, and low boots.

“Wow,” said Sean, picking up the dress. “This is Ava?”

“They’re all Ava.”

“All of it? The underwear, the boots?”

“Yup, all of it.”

“I didn’t know you could do that!”

“Neither did I. Ava walked me through in the Venn machine. The trick is, everything has to be part of a set.”

Sean stroked the leather dress. It felt soft and supple.

“Well, get dressed, babe,” Mel grinned. “The dance floor awaits!”

*
Sean was not, to be honest, the greatest dancer. She was no Anna. But what she lacked, she made up for in enthusiasm. So did Mel.

The club was packed with couples. Boys dancing with girls, girls with girls, boys with boys. Mel cast her eyes around. She was pretty sure that girl in the black playsuit had a boyfriend last week. She was also pretty sure that girl she was dancing with was her Venned boyfriend.

Sean was drinking in the admiring glances she was receiving. She looked great in Ava, no doubt.

“I hope you’re enjoying this too,” she whispered to her dress.

The thought that all she was wearing - the panties fitting around her crotch, the bra cupping her breasts, the sheer black stockings - was her buzzed-headed friend knocked her out.

The music that night was hardcore, electronic pulsing beats. The pair let themselves go to the music. But whatever the tune, all their dancing seemed to turn into bump n’ grind.

After a few hours of fun, Sean turned to Mel. “God, I’m so turned on by you right now.”

“Me too. What say we blow this joint?”

*
They tumbled into bed, struggling out of their clothes. Mel stopped Sean when all she had on was the stockings. “Leave them on. Let Ava enjoy this too.”

“You sure you’ll know what to do with that thing?”

“That’s the great thing about Venn machines. I know everything a man would know. It’s instinctual.”

“Oh God! I just thought … we’re not using protection. What if I get pregnant?”

“That’s the other great thing about Venn machines. You can’t get pregnant.”

“There sure are a lot of great things about Venn machines, aren’t there?”

“You said it. Now lay back and let me kiss you.”

*

Exhausted, they slept until late in the morning. Sean woke with her sleeping boyfriend spooning her. One stocking lay in the bed next to her; the other was still on her leg. When did that happen?

Turning, she gazed at Mel’s sleeping face. It looked so familiar, yet so different too. A wave of affection for her boyfriend washed over her. Her crazy partner was pushing her into so many new directions.

As a boy, she’d never been the most masculine figure. She was never into sports or cars. Still, she’d never thought of herself as being particularly feminine either. Now, though … whether Melanie was her girlfriend or boyfriend, she loved being a woman.

She had some vacation coming up. What would Melanie say if Sean simply decided to keep being a girl for some time? She knew the Venn machine only changed you in increments of three. Could she be a woman for three weeks?

Yes. Yes, she thought she could.

Maybe even three months.

Or three years.