Disclaimer: I do not own Regular Show or any of its characters or ideas. This is purely a fanfiction, written by a fan, with a storyline based somewhat off of Mookie000's ideas, represented in my own manner. I hope you enjoy this!

Authors note: This is a lemon yaoi fic between Mordecai and Rigby and implied Mordecai and Margaret (obvious implications, though. So it's not 100% yaoi. But the main idea is buttsex between boys you guys) so if you don't like it, don't read it. Thank you, and have a good time reading! Or not reading, if you don't wanna read buttsex. Your choice. (Also it's implied that I'm using Mookie000's human designs, but I will try to not do too much implying for those who like to think otherwise. You know who you are... Heheheh~)

He couldn't believe this day had actually come. The day that Mordecai left him for that girl.

It started back in January.

Mordecai was fumbling around in the supermarket trying to prepare his Valentines day gift for his lady.

"I need to find something special, dude. And cheap. You know Benson hasn't been giving us much credit lately, and I finally have her. I'm not letting this go." the blue-haired man spoke up in that arguable tone. He accidentally knocked one of the chocolate boxes off the shelf.

"Dude come on, I wanna go home and play video games! And I'm starviiing!" the shorter one exaggerated.

"No, dude. Not today. This might not be my only chance to impress Margaret, but it's definitely not one a new boyfriend should pass up." He stared Rigby down for a moment, just before spotting a moderately priced item with a cute and simple yet satisfying design. A chirping bluejay and robin couple, both pocket sized that have magnets at the ends of the beak to show kissing. He thought this perfect, since they shared similar colors. "A-hah! This one is perfect!" He tossed it into the cart. An eye roll was Rigby's only response.

"Let's go." Rigby stomped toward the cash register, not paying much attention to where he was going. He knocked into some chocolate boxes and they fell to the floor. Reluctantly, Mordecai bent down to help his best friend. "Stop. I've got it." Rigby said in a dark and quiet tone, his face somewhat hidden behind the hood on his shoulders and his hair in his eyes.

"Dude, is something wrong? You seem more pissed than impatient today." Mordecai stood to reach the higher shelves. He wasn't too interested in Rigby's feelings but more of how impressed he was with himself. He had noticed that there wasn't any more of the bluejay and robin pairs and thought himself lucky. That was what was on his mind.

"I just," Rigby sighed. "I just hate Valentines day." He sat the last box on the shelf. "Let's just go, alright?"

The drive home was somewhat awkward. Mordecai chattered on about how he knew how Margaret was going to react to his gesture and how lucky he was to have found his gift for her. But Rigby wasn't paying any attention. He was leaned back on the seat of the cart, staring at the cart ceiling. There were soda stains and what looked like mold and a Cheeto on it. Gross, he thought to himself.

When they got back home, it was pretty late. The weren't at the supermarket but 20 minutes, getting all the things on Benson's list. Even so, leaving late means you arrive late. Benson was waiting on the porch chair.

"Where have you guys been? I've been waiting for hours!" His voice started to grumble as usual.

"Sorry, Benson. We kind of forgot, because we started playing this new game, but it's okay because we got all the stuff you wanted.. Right? Heheh.." Mordecai's tone went from apologetic to awkward in a matter of seconds. Benson, while happy that they didn't completely mess this one up, was still pissed about the time, 10:45.

"Whatever. Get some sleep you guys. We've got an early morning ahead of us. And don't forget to put up the food, okay? I'm going home, " the angry boss said, stomping off. As Rigby gabbed most of the bags and headed for the front door, he accidentally bumped into Benson. "He, watch it, Rig-" He was cut off by a door slamming. Rigby had already went inside. Silence fell for a moment before Benson said, "Wow, what's his problem?"

"Not sure. Hey, check out what I got for Margaret!" He pulled the gift out from his pocket and demonstrated it's function to his boss. Laughter could be heard from inside, as Rigby stomped into the kitchen. He put up the milk, eggs and meats, then went into the bedroom.

"So what's been up with you? You've been acting kind of strange. I'm not into this, bro." Mordecai fell onto his bed. He rolled over to look in his friends direction.

"Nothing, dude, I'm just tired," the messy one said convincingly.

"Alright, if you're cool, I'm cool."

"Yeah, I'm cool. Goodnight, dude."

"'Night, dude."

And the lights were out.

As the days went by, Mordecai kept dragging Rigby to the coffee shop to see Margaret. He sat next to Eileen to keep her from getting in the way. That was easy for Rigby to do since she, for some reason, liked Rigby. They talked about food and games, but she didn't understand much of what he was saying, as did he her.

Finally, it was Valentines day.

Mordecai had been saving up for this day since he and Margaret started dating. Everything was going smoothly and nothing could ruin this night. He was taking Margaret out to dinner and back to her place for a movie. There is where he was going to give Margaret her gift.

Rigby sat at the end of Mordecai's bed, watching the taller boy fidget between two suits.

"Dude, dude, which one looks better on me? I mean, we're not going to anywhere too fancy, but it's not like, really shitty or anything, so like, this is my day, what do I do?" he nervously spouted.

"What do you mean, 'this is your day'? It's just Valentines day." He pointed to the right one. "You look nice in that one.." he mumbled.

"Thanks bro, I owe you one." The left one went practically flying back into the closet as he kicked it shut. "And what do you mean, 'just Valentines day'? This is the day. Like, the day, the day, " he emphasized. Curiously, Rigby lifted his head.

"What are you even talking about, bro?" His voice cracked. He hated that. He was 23 and his voice still cracked sometimes.

"The day I'm gonna get it in. I don't mean to sound like a douche when I say it, but this is the day Margaret and I finally do it! That's how it is in all the movies, so that's what I'm gonna do! I'm gonna rock this so hard dude!" He slipped off his pajamas and put on a t-shirt and jeans in the meantime.

Rigby stood up and clenched his fists. His head was down, hidden from his best friend. "I'll be right back, alright?" His voice was trembling but Mordecai was too busy to notice.

"Alright, dude." He hung his suit on the front of the closet door.

Rigby stepped out of the bedroom and ran down the hallway to the bathroom.

For a moment, his reflection looked sad, almost empty. He aimlessly stared at himself. I'm disgusting, he thought to himself. The worst of the worst, yeah? He questioned his judgment on this situation.

For the past year or so, he realized how he really felt about Mordecai. It started with a drunken night alone. Mordecai was clearly in the mood, and, even though they were both convinced they were only interested in women, felt it was okay to try it together. After all, they weren't getting any, and what are best friends for but to help, right? His reasoning was clear before, but he wasn't so sure now.

Now, he hurts. He wondered if he would have ever hurt so much if he never allowed this to happen the way it did. He loved his best friends touch, the smell of his sweat and the feeling of his panting breath on his neck. He loved the grunts and groans, the tightening grip on his own body in so many different places on his body. He was not only attracted to his companion, but wanted him all to himself.

Selfish, his thoughts echoed. That's all I've ever been.

Oh my god thank you for reading this far! There will DEFINITELY be more to come. This is very fun (and hard) to write! There will probably be three or four more chapters, and there will be straight sex and gay sex because I like guilty sad romances, since I'm not romantic by far. So, if you like sad romances with happy endings, keep yourself updated maybe?

Bye for now!