Her first house party with Miki.

It was a cool autumn Friday night, and Yuki was at her first college house party. Miki knew the Amy, the host, from one of her classes and had been invited to the party with encouragement to bring a friend. Yuki was happy to go and was even more comfortable when she saw the party was all women when the pair arrived. The lack of men made it easier for Yuki to accept her first drink and her complete lack of experience with **** made it very easy for his first drink to quickly become her third.

The night was going well. Yuki was happy listening to the music pumping through the cheap speaker system, courtesy of a housemate's laptop and playlist. Good atmosphere, good company in the form of her best friend, and a pleasant warmth from Yuki's first foray into **** meant it would be almost impossible to ruin her mood.

"Hey, dork! Do Mom and Dad know you're at your first big girl party?" snapped Yuki out of her reverie faster than a slap to the face.

"Rei?! What the fuck are you doing here?!" was Yuki's immediate reply.

"Because I'm cool and have friends here. I didn't have to get dragged along by my pity-invite friend." Rei shot back, tossing a mocking glance Miki's way.

Miki knew she had to do something or else things between the sisters were going to get out of hand. A plan quickly took shape in Miki's mind, but **** meant the plan wasn't necessarily well thought out.

"Hey! Back off, Rei! I was invited, and your sister's my guest, so just... deal with it!" Miki said as she stepped between the bickering siblings. The group had quickly become the focus of the party, and all eyes were on Miki trying her best to stare down the taller woman. "We'll show you how much we belong here!"

A part of Miki's brain was screaming at her that this was a stupid idea. She thought of all the ways it could go wrong, and all the ways it was a bluff. Thankfully, she knew Yuki would give her an out that would let everyone save face, and hopefully they could all just get back to enjoying themselves. In spite of her internal panic, Miki spoke with a surprising confidence.

"Pick anyone here. Beer pong, two vs two, loser..." This was it, the challenge that would entice Rei, and would be a line Yuki would refuse to cross. Things could be defused from there. "Loser flashes the party."

"Deal." Rei said immediately. "Hey, Evelyn! Set up the table, you're gonna help me humble my sister and her friend!"

"Yuki?" Miki asked, ready for her best friend to voice her complete opposition. The rest of the party would laugh, agree it was a bit much, and things would settle dow-

"You're on."

What?

"What?!" Miki said as her drunken plan started to immediately go awry.

"I said let's do it! Miki and I are gonna kick your ass, and you're gonna be the embarrassed one for once!" Yuki declared, brimming with unearned confidence.

This was the part where Miki talked her best friend out of it. This was where she was supposed to drag her away from the party and avert disaster. But two big things overrode Miki's rational thought. First, Miki was hopelessly in love with her best friend, and the idea of getting to see her bare chest made her lightheaded. Sure, if they lost she'd also be showing her tits, but nobody would be paying attention to her b-cups with Yuki's chest beside it. But while Yuki was the focus of Miki's heart, her sexual awakening had been Rei. Ever since the day Miki had been over at Yuki's house and a hungover Rei had stepped into the hallway in nothing but an unbuttoned blouse and a thong, Miki had been unable to stop imagining what lay just out of sight under the loose shirt and scant excuse for panties. Even as Yuki had been shouting at her sister to "put on some goddamn pants" Miki couldn't stop staring at where she could just barely see a hint of dark brown areola, and she could swear Rei had winked at her.

Miki should have talked sense into Yuki and herself, but she was hornier than she was rational.