OK, so this is AU – in which Finn and Rachel break up and Sebastian is Bi. Also Nick and Jeff have a thing for Rachel.
P.S: For Rachel's prom look search her at the 2011 SAG awards. For Santana her look is from last years Golden Globes and for Quinn it's her 2011 Golden Globes look.

Finn Hudson had dumped me the day before prom. Who the fuck does that? I had not date and no back-up plan even my go to pals Kurt and Mercedes had dates. I'm pretty sure Quinn was going alone and we were friends now. But I think after getting dumped and going to prom with a girl wouldn't be too good for my reputation or hers since she was running for Prom Queen. So that's the story up to date. Right now I was at the Lima Bean, any other day I would have ordered a green tea but I was pissed so I bypassed the healthy and ordered a chai latte with soy milk. OK – so it was still a little healthy. I looked around for a place to sit and my eyes landed on Sebastian who was sitting on an armchair next to a window, his eyes trained on the people outside.

"Sebastian!" I cried and he jumped and looked over at me, a confused look on his face. I walked over quickly and sat on the counter in front of him, putting my coffee next to me.

"Rachel." He acknowledged coolly. "To what do I owe the pleasure?"

"A dumping. You're coming to prom with me." I stated.

Sebastian POV

I'd been on fairly good terms with the New Directions after Regionals and had managed to form an acquaintance out of some them – the ones who came to the Lima Bean as regularly as I do – Santana, Rachel, Blaine. But never had I expected that Rachel Berry would be asking me to prom. She was sitting straight in front of me, palms resting on the table on her side, swinging her legs and leaning forward slightly. She was in a black V-neck sleeveless shirt and a white dotted skirt. She looked good.

"I'm sorry but why am I going to prom with you?"

"Because I need you to make Finn jealous. Kind of, I'm not getting back together with him because I'm over the fights but I just want to dress up in a hot dress and I need arm candy. I'm winning this break up." She said obviously and took a sip from her cup.

"So I'm a rebound?"

"I suppose. I'm not going to prom without a date. It's my senior year and I don't want to look back at my picture to see that I'm by myself in it."

"Sorry Rachel. I don't do rebounds unless there's sex involved." Rachel's face went dark and she moved closely grabbing a fistful of my shirt and pulling me up.

"OK Sebastian. Here's what's going to happen. You're coming to prom with me. You're going to put on a suit that isn't navy or red and you're going to dance with me. I don't give two shits whether it's in your interest or not. Mkay?" I shrunk a little under her steely glare.

"You've been spending too much time around Santana and me." I said.

"Mkay?" She repeated.

"Fine. But you owe me."

"If you say you have to have sex with me afterwards I will kick you in the nuts." She said but let go of my shirt and sat back down on the table and took another sip from her cup.

"No. My father's having a benefit in two weeks. You're going as my date."

"Why?"

"Either I have a date or I get arranged with my Mum's friend's daughter. Not pretty."

"You are vile."

"Maybe you'll go to prom alone."

"Fine. Dress normal. I'm wearing a silver dress."

"A nun costume most likely." I murmured and her eyes danced

"Take about half that fabric off and you have my dress." She grinned and I felt my jaw drop. "See you tomorrow." I waved cheerfully.

"I'll be there at 6." I said, my thoughts elsewhere, all I could think about what the dress was going to look like. I finished my coffee quickly and left

I pulled up into Dalton's car park and made my way to my dorm when I was cut off by Nick and Jeff.

"Yes?" I sniped.

"Thad's holding a party tomorrow. You coming?" Jeff asked.

"Yeah, you can tell Blaine and he can bring Rachel." Nick nodded excitedly.

"Alright listen here dumb and dumber. One; Rachel has prom tomorrow and two; I'm taking her." I don't want to sound cruel…well yeah I do, but I couldn't help but grin at the way Nick's and Jeff's jaws dropped open.

"How-"Nick asked before Jeff covered his mouth.

"I will give you anything if you let me take her." He bargained.

"No." I scoffed and walked off.

"Anything." Jeff and Nick repeated and I shook my head.

Rachel POV

I made the finishing touches on my make-up and shimmied carefully into my dress so I didn't tear the fabric. The dress was very slinky and melded to my body perfectly – it was white with silver sparkles covering it. It had a very dangerous plunging V-neck and a silver belt that cinched in my waist. My hair was undone and a volumous mess of curls. This was going to stop Finn Hudson in his tracks. I pulled on my gold strappy heels and grabbed my purse, making sure my tiny silver camera was inside.

"Rachel! Sweetie your date is here." My daddy cried and I put a smile on my face before making my way down the stairs.

"Hol-y crap." I heard Sebastian say.

"Wow. Sweetie, that's very…" Dad grimaced and put his camera down. "You be sure to take lots of pictures." He offered a smile but his eyes were wide and he walked away and whispered something to Daddy that sounded like 'Make her change.' Daddy grinned and mouthed 'She's an adult.'

"OK, we have to go Daddy or we'll be late." I waved and Sebastian wound his hand around my waist, leading me away from the house. He looked very well put together in his classic suit – Black blazer, pants and tie and white shirt.

"Don't you look spiffy." I said and Sebastian laughed.

"Who say's spiffy anymore Rachel?" He asked and opened the door to his Mercedes.

"I do." I objected, Sebastian shook his head and handed me a box.

"I picked it from the garden outside of the Dorm block. It's the most I could do on such short notice." I opened the box to discover a small bouquet of white roses tied with a brown ribbon.

"I had to steal that ribbon. Consider that an honour. I have never put this much effort into a date…maybe because I've never been on a date-"

"This isn't a date. It's you accompanying me to prom so I don't look like a complete loser and I have some form of a cute guy with me."

"I'm not cute." He objected.

"You're right, you're downright ugly." I said to myself, looking out the front window and shaking my head. Sebastian turned to me and opened his mouth before closing and moving his attention to the road again.

"No – I am attractive, handsome or hot. You call your little baby brother or a freaking kitten cute. Not Sebastian Smythe."

"Careful Sebastian, that big ego doesn't go with your suit."

"Isn't tonight going to be fun." He sighed.

"Put a smile on your face or I'll staple it there. If I don't win this breakup, I'll break your nuts."

"You definitely need to stop hanging around Santana."

"I get half of my comebacks from you." Sebastian rolled his eyes and pulled into the parking lot of McKinley.

"Berry! You're here. I suggest not going into the gym right now. At least for the next 5 or so minutes." Santana said and came over to the car and opening my door. "Crap. Are you trying to start a sex riot?"

"I'm trying to make Finn jealous."

"Well Finn already beat you to the punch."

"He's making out with someone isn't he?"

"Yeah. Some skank on the team with me. Sorry…But that dress is incredible. If I weren't with Brittany I'd have tapped you so hard by now. Oh hey Sebastian." Santana nodded as Sebastian came around the side of the car and stood beside me.

"Well you don't look too bad yourself." I said; Santana was in a pale pink floor length, strapless dress which showed off her curves amazingly. Her hair was pushed to over one shoulder with a perfect wave in it.

"It's my get lucky dress. Britt and I are up for Prom King and Queen. You should see Britt; she's in a top hat and all."

"San? You out here? Finn's finished sucking out Andrea's tonsils." Quinn called and came out of the gym. She was in a vintage looking flowing strapless gown, her hair was curled perfectly.

"Crap Rachel, your boobs look awesome." She cried and Sebastian wound his arm around my waist and pulled me toward him. I looked at him, confused.

"How heterosexual of you Quinn." Santana laughed.

"Please they look fucking amazing, now I'm missing out on Brittany singing D.I.N.O.S.A.U.R in a freaking top hat and a lady suit which is also show's off some freaking amazing cleavage."

"I think getting hit by a car made Quinn gay." Santana said and followed Quinn into the gym. I linked my arm through Sebastian's.

"Let's do this." I said.

"You're not being sentenced to death." Sebastian bumped me with his hip and I laughed.

"Let's just make this look believable." I mumbled.

"Easy peasy." He said back and dragged me out onto the dance floor, right past Finn who gaped and seemed to momentarily forget about his date.

"Rachel." He breathed. I smirked knowingly at Sebastian and turned to Finn.

"Yes Finn?" I asked.

"You look….wow."

"So I've heard." I said coldly and put my hands on my hips.

"Do you have a date?" He asked cluelessly, oblivious to Sebastian, his own date standing there with an unbelieving look on her face.

"I do. And we're going to go dance. But you go back to sucking out whatever her name is' tonsils." I pointed to Andrea and turned back to Sebastian who willingly took my hand and took me over to where Puck and Quinn and Mercedes and Sam were dancing. A slow song came on and Sebastian wrapped his arms around me, my own reaching up to wind around his neck, we swayed effortlessly.

"Thanks for coming out tonight. It means a lot, we may not be the best of friends but you've really come around since the incident. I no longer want to throw coffee in your face whenever you show up at the Lima Bean."

"Thanks?" He offered. I turned to see Finn who was staring at me.

"Do something."

"Do what?"

"I dunno. Something…provocative." I shrugged. Sebastian shifted his grip and dipped me, it was very Dirty Dancing esque and I heard Puck gasp. I giggled and Sebastian bent to whisper in my ear.

"The bumbling giant just ran into the bathroom."

"Don't stop on his accord." Puck said and watched, Quinn came over and slapped his shoulder playfully. Sebastian grabbed my hand and twirled me around.

"We can dance better than that Puck. Come on, dance off." Quinn offered and I swear Mike gravitated out of nowhere.

"Dance off?" Was all he said and Tina found her way through the crowd to stand by Mike's side.

"Bring it." She grinned. I turned to Sebastian who nodded.

"You're on." We said at the same time. After that, it turned into probably the most hilarious thing ever. After a few moments, Kurt and Blaine came over and then Santana and Brittany. Tina and Mike were clearly kicking our asses and Sebastian took the dance as an opportunity to touch places he shouldn't have been touching. The way his hand curled around my thigh and lifted my leg up felt too good to stop. It wasn't until Puck lifted up Quinn and lost his footing, we all agreed to stop. That's how we all ended up at the punch bowl.

"Rachel, I am really enjoying your dress. Very different. " Kurt nodded in appreciation.

"Don't her boobs look great?" Puck asked cluelessly, grinning like an idiot.

"Puck!" Quinn complained but a smile was on her face, her own eyes scanning over my chest regularly. Then I realised just about everybody was staring at my chest. Minus Kurt, Tina and Mike.

"Oh my god, guys. Have some decency – boundaries!" I cried and everyone snapped their head's away.

"Thank you!" I cried and rested my head on Sebastian's shoulder.