AN: Hello, dears! Yes, it's me...AGAIN. Don't adjust your screens. This is another story I've started, but I have a special reason for this one, and it's actually been written for DAYS, but someone wouldn't let me post it a minute before, now.

So, I know you all know by now about the totes adorbs friendship I share with my beta FloraOne, and today just happppppens to be her birthday! Well, for those of us in the US and western parts of Europe, it's not quite her birthday yet, but it is in Germany, so it counts!

We decided some months ago to gift each other fics for our birthdays, and hers just happened to fall right in the middle of other fics of mine being written, so, I had to stop everything, and do this, because honestly, she's the reason I'm here at all, anyway 3333 You can look forward to her birthday fic that she's writing for me coming up in March!

If haven't found the both of us over on tumblr, yet, we'd be delighted to have you! Flora's blog is a gorgeous mix of everything she loves, but a lot of SM stuff, and mine is all SM, all the time. You can find both of us under these names on tumblr, as well.

So, without further ado, I hope you enjoy this silly little diddy, and please let me know what you think!

PS HAPPY BIRTHDAY, FLORAONE! You have no idea how grateful I am that you were born.

PPS This is definitely rated M. Like right off the bat, smut fest, so, you've been warned.

PPPS I haven't said this in awhile, BUT yeah, Sailor Moon still belongs to Naoko….dammit.

Prompt: UsaMamo BFF birthday party fic with a non-asshole Seiya thrown in for good measure.

oOo

"Mako-chan, guess what?!" the bubbly, blonde Minako gushed to her friend, while Mamoru's muscles tensed, sensing exactly where this conversation was headed.

The three were seated in a small cafe that was one of Makoto's favorites, and since the girl was practically a master chef at the age of twenty, he knew the food would be wonderful, even if Minako's company wasn't.

"Minako, is it impossible for you to go an hour without descending into salacious gossip? We're supposed to be planning Usako's party, in case you'd forgotten," he bit out, unsuccessfully hiding his annoyance.

She turned to him, a look on her face that would cause many a male or female to wither away, and he counted himself lucky that he was not among those numbers.

"Could you be anymore of a killjoy, Mamoru?" she quipped back, complete with dramatic eye roll, as they glared at each other, while Makoto cleared her throat awkwardly.

"Uh, Mina, you know Mamoru is really busy, so maybe we should talk about whatever this is later-?"

"Absolutely not! This involves Usagi, and since Mamoru is her 'best friend," she emphasized her disdain for the title with air quotes, "he needs to hear this too."

"And what do you mean by that?" he growled out, and he felt Makoto flinch beside him, her hand reaching out to steady him. Minako knew damn well what he was to Usagi.

"Mina, just go ahead and spit it out, would you? And stop purposefully goading Mamoru," Makoto pleaded, trying her best to keep the peace.

Minako stuck her tongue out at Mamoru, before the excitement of her news lit up her face, once more.

"So, I heard that THE Seiya Kou is finally going to make his move at Usagi's party!" Minako squealed out, clapping her hands happily, her outburst so loud, several tables near them turned their heads in obvious annoyance.

Mamoru felt his heart pound against his chest at Minako's news, and his fingers stilled on the keyboard of his laptop, where, until just now, he'd been contacting vendors for Usagi's party. The blood drained from his face, and his breathing nearly stopped as a loud ringing sound in his ears kept him from hearing much of the remaining conversation.

Usagi and Seiya?

He'd known that Usagi had made fast friends with the pop singer when he joined her class in high school, but the few times Mamoru had seen them together, there was obviously nothing romantic going on. At least he thought…

It wasn't as if Usagi spent all her time talking about him. She occasionally mentioned Seiya in passing, but it was nothing more than a simple line in a conversation.

And he of all people would know, after all.

Mamoru had known Usagi for nearly six years, having met her while she was still in middle school and he was two years ahead in high school. She'd desperately needed a tutor for, well, everything school related. They'd had a bit of a rocky start, him teasing her about her hair, and she insulting his personality at every turn.

Until, one day, the nosy teen had followed him to the cemetery, where she'd found him leaving flowers on the graves of his parents. She simply came to stand next to him, taking his hand in her own, and allowing him the time he needed.

He'd told her everything that day. How he had no memory of these people who had died. How he'd lived a lonely, loveless existence. How he'd turned to academia to fill the void.

And she'd squeezed his arm in response, listening intently while he spilled his secrets to her and the dead around them, her eyes never judging, never pity filled.

It had been that moment when he looked down at her, arms clutched tightly around his, and brilliant, blue eyes staring understandingly back at him, that he'd realized how desperately in love with Usagi he was, and had been since practically the beginning.

She had filled that loneliness in him. Had made him feel, again. And it nearly overwhelmed him.

But he wouldn't, couldn't tell her this.

Other than the adorable nicknames they'd bestowed upon each other, the rabbit gave him no indication that she felt anything remotely romantic for him. And when she started including him in nearly all of her activities, dragging him to every silly festival and movie night alike, his feelings only grew along with his resolve to not disclose his feelings.

There was no way he was going to mess up the most precious thing he had.

And so, six years later, here he was, planning her twentieth birthday party with their mutual friends, who were discussing another guy's plans to make a move on his sweet Usako.

"I don't know, Mina. Usagi's never really mentioned anything about having those kind of feelings for Seiya." Makoto's voice filtered through Mamoru's panicked state, as his eyes finally focused on the brunette, delicately folding decorations for Usagi's party.

"What do you mean?!" Minako protested, expertly continuing to accomplish nothing. "She's been head over feels for the guy since he walked into class four years ago!"

Makoto shook her head, laughing a little. "You know Usagi. She has stars in her eyes for any cute guy she sees, especially a celebrity like Seiya, but that doesn't mean she wants to bone them."

"Makoto!" Mamoru gasped, scandalized.

She looked at him a little sheepishly, shrugging her shoulders and mumbling, "Sorry."

The grin that lit Minako's face at the exchange unnerved him to the core. Placing her elbows on the table, and propping her head up on her hands, she winked at him.

"What's the matter, Maaaaamoruuu?" she drawled out like a five year old on the playground. "Don't like to think of anyone sexing up your precious Usako?"

His cheeks stained bright red. "Wh-what? No! You know it's not...It's not like that!"

She winked at him, once more, while Makoto sighed deeply, shaking her head. "Oh, suuuuure it's not."

Mamoru shut his laptop, reaching for his bag that lay under the table, and haphazardly throwing the computer inside it.

When he spoke, he could still feel the blush on his cheeks. "As fun as this has been, Usako's coming over this afternoon, and I need to get home."

Without another word, he walked away from the table trying his best to block out the childish kissing sounds Minako was making in his wake.

oOo

"Hey, Mamo-chan?" Usagi asked, sitting up slightly, and lifting her head from its previous spot in Mamoru's lap.

"Hmm?" Mamoru answered, his eyes snapping open at the sound of her voice, having nearly fallen asleep on his couch, as they watched some ridiculous romantic comedy, because Usagi had practically begged for them to spend the afternoon that way. And who was he to deny her such a simple request?

"Have you ever thought about having sex with me?" she asked, as if it were the most obvious question in the world.

He was certainly awake now.

"U-usa?" he stuttered out, moving as far away from her as possible, on the tiny, confined space of the couch.

"Have you ever thought about having sex with me?" Usagi repeated, her expression never changing.

"W-what...why…" he began, stopping to take a deep breath in order to steady himself, and rubbing the back of his neck nervously. "Why would I think about that?"

"Well, it just makes sense doesn't it?"

"Uh, well, I-"

"I mean, we've known each other for years, now," she reasoned, moving closer to him, and reaching out to brush a wayward strand of hair from his eyes.

Mamoru's eyes grew wide at her touch, his breathing quickened at her proximity, and his body began to react to her, as it had done so many times before.

"You're my best friend, Mamo-chan," Usagi went on, "have you never...thought about me that way?" she asked, moving even closer to straddle his lap boldly, pressing him into the back of the couch, as he bent his head back to look up at her.

"I, uh, I-"

"Can I tell you a secret?" she whispered next to his ear, and all he could do was nod, as his attraction to her grew to the point where it was unmistakable.

"I've thought about you like this…" she nipped at his ear lobe, and ground her hips against him, "...for so long."

Mamoru grit his teeth from the sensations she was sending through him, his hands balled into fists at his side, as he strained to keep himself from touching her. "But Usa…" she moved, again, and a hiss of air left him. "I thought...you liked that pop singer," he managed to get out, completely blanking on the name of that ridiculous guy Usagi was supposedly into.

Usagi paused her movements, placing her forehead against his her brow wrinkling in confusion. "Huh? Who?...Seiya?"

He nodded, eyes transfixed on hers.

"He's alright," she said quietly, a knowing smile on her face, as she leaned down, her lips barely brushing his as she spoke. "But he's no you."

He felt himself flush at her words, his arousal growing by the second, beginning to become almost painful as it strained against the confines of his pants.

Usagi reached down without breaking eye contact with him, taking his hands gently into hers, and placing them on her hips just under the hemline of her skirt.

Mamoru had to close his eyes to bite back a moan at the feel of the smooth skin of her stomach beneath his hands, and when he could finally compose himself enough to look back into her eyes, he was startled to find them gone, as Usagi leaned down and placed a searing kiss to his neck.

And he did moan then, feeling her gently suck the skin where he was certain she could feel his pulse beating wildly, all while she continued the distracting movement of her hips.

His head fell back, as her tongue darted out, licking down to his collarbone, and he had to bite his lip to keep from crying out.

"Have you ever thought of me like this, Mamo-chan?" she whispered between kisses to the skin just above the top of his shirt.

"Yes," he groaned out finally, digging his fingers into the skin of her hips, still afraid to move them, in case it wasn't wanted.

Mamoru felt Usagi's hands move to the buttons of his shirt, her fingers steady and sure, as she started to undo them. And her eyes came back to his, the most gorgeous and captivating color of blue he'd ever seen.

"Do you want me like this, Mamo-chan?" she asked, as she trailed a finger down his chest, stopping just above the belt buckle that separated his skin from hers.

"Usako…"

Her fingers were now dipping just slightly into the waistband of his pants. "Do you, Mamo-chan?"

It was all too much.

"God, yes, Usako."

A giggle escaped her at the desperate tone in his voice, while she began kissing down his chest, her fingers slowly unbuckling his belt. And after she had unzipped him, she looked up at him with the most adorable pout, as if she were disappointed she couldn't go any further.

So, he lifted his hips, and pushed down the tight jeans he wore, eyes never leaving hers, answering her smile with a nervous one of his own.

Before Mamoru could even begin to process what was about to happen next, Usagi had reached into his boxers, freeing his cock from the confining fabric.

He let out a strangled sound when he felt her hands on him, and he began to desperately clutch at the fabric of the couch with his hands, trying to resist the urge to touch her, run his hands through her hair…

Usagi gently moved her thumb in a circle around the tip of him, spreading out the drop of moisture that was found there, and the mischievous look she gave him made his heart stop beating for the briefest of moments.

What happened next was something he had tried for six years to keep from entering his mind. Usagi was his best friend, after all, and his attraction to her and for her couldn't come between them. But even though he tried to squelch the love he held for her, there were times his hormones could overtake him, especially in his dreams.

If he hadn't known any better, Mamoru would have sworn this was, in fact, a dream, but Usagi had never felt so real, so alive, so his.

And when he saw her tongue leave her mouth to touch and lick his hardened, aching flesh, her eyes never leaving his as she slowly made her way to the tip, Mamoru knew he would never manage to last even a minute with the feelings coursing through him.

"Usa," he groaned out, hands moving to her face to gently pull her off of him.

She looked confused at his action, and he groaned out, "I just need…" hands traveling from her face, to skim the top of of her shirt, that lay just above her breasts, while she moved back to straddle him, emboldened by his touch, "...just need to feel you."

Mamoru did then, what he had longed to do since the first time he'd ever laid eyes on Usagi. He kissed her, meeting her halfway between them, and as he felt the softness of her lips moving with his, he was lost.

He took a few moments to simply feel, enjoying the softness of her skin, and the luscious silk of her hair as it moved through his fingers. He could have stayed like this with her for forever, but the one in his arms had other plans.

She began to move hips back and forth, rubbing soft and damp fabric against his arousal.

Mamoru dug shaking hands into her hips, his breath coming out in a hiss of pleasure, and he knew it was time to give as good as he was getting. He had to make this last, make it count.

Bringing Usagi's face down to his, again, he slid his hands down to the exposed skin of her thighs, as her mini-skirt had ridden up to a level that left nothing to the imagination, and he enjoyed the moan she let out into their kiss, taking full advantage of her open mouth, sliding his tongue in to dance with hers.

And she continued her movements against him, back and forth, over and over, causing him to break their kiss in order to catch his breath and bite his tongue to keep from losing complete control.

Moving his hands from her thighs, Mamoru dipped one, long finger into the fabric of her underwear, smirking when he found slick heat waiting for him, causing Usagi to gasp at the contact.

Running a finger, up the length of her folds, he withdrew just before reaching her clit, causing her to whimper in frustration. He felt emboldened by knowing his touch could do such things to her.

"Do you want something, Usako?" he whispered, after repeating the same movement half a dozen times, until she was practically writhing with need.

She opened her mouth to reply, but the only sound that came out was a lust filled moan, as Mamoru brought his finger back, and began to rub slow circles on her clit.

"Please, Mamo-chan...I need…" she stuttered out, while her hips began to move against his finger, seeking more friction and pleasure.

He leaned up to place searing kisses against her neck. "What is it, Usa?"

"I-in my bag. Condoms," she breathed out, and he couldn't help the satisfaction that coursed through him at her lack of speech.

"No need," he whispered, reaching into his back pocket, and producing his wallet, with a shiny, silver package inside.

Usagi scrambled off of him with a giggle, standing up to rid herself of the fabric that kept getting in the way of his touch, watching Mamoru with hooded eyes, as he spread the condom onto himself.

And before he could blink, Usagi was back, straddling him just as she was before. She lowered her forehead to touch his, and looking into his eyes, she breathed, "Do this often?"

Mamoru's eyes grew wide at her question, but he shook his head. "No. It's only you, Usako. It'll only ever be you."

At his confession, Usagi lowered herself onto him, causing them both to throw their heads back at the sensation.

He had to dig his hands into her hips to still her movements, while he breathed long, deep breaths to steady himself, release dangerously close on the horizon.

When his breathing had calmed somewhat after a few, long moments, Mamoru could finally meet Usagi's eyes.

She smiled at him, reaching her hand up to stroke his cheek. "Ready?"

He had barely had time to nod before she was moving, again, her hands clutching the back of the couch behind his head, as she rode him in the most exquisite way possible.

She started off slowly, drawing low and long moans from both of them, but when she found a way to swirl her hips so that her clit rubbed against him, it didn't take long before her pace became frenzied.

Mamoru reached down between them, his thumb finding her sweet spot quickly, as her movements became faster, and shorter still, and he began to thrust up into her, his hips leaving the couch, meeting her insatiable need with his own.

And he felt her start to come around him, her eyes rolling back, as she stilled her movements, clutching at his chest for want of something to bring stability to her spinning world.

He held her to him, while he continued to thrust as deeply into her as he could, knowing that with just a few more strokes, he'd join her in that oh so addicting plunge into ecstasy.

"Mamo-chan?"

His eyes flew up to hers, as he slowed his movements temporarily at the sound of her voice.

"Mamo-chan, are you awake?" Usagi moved out of his embrace, leaning back to look at him and using his arms to hold her balance, a quizzical expression on her face.

He let out a bark of a laugh at the absurdity of her question. "God, yes, I'm awake."

"You look kinda funny. Are you having a nightmare?" she asked with concern.

Mamoru raised an eyebrow at her, stopping his thrusting altogether. "What?"

"Your eyes are closed!" she said, a hint of annoyance in her voice.

"No, they're not! See?" He closed his eyes, and opened them wide to prove to the silly girl that he was, in fact, awake, because he needed to come, and it was just right there...

But when his eyes opened, again, a very different sight than the one he'd left greeted him.

He was in his bed, a fully dressed, non post-sex Usagi was standing over him.

"Mamo-chan, you're really flushed." She leaned down, and placed her hand to his forehead. "And sweaty." Her nose wrinkled up at her latest revelation.

He was frozen in place, grateful for the thick covers on his bed that hid just exactly why he was flushed and sweaty. "U-usako, what are you doing here?!"

Usagi frowned at him. "You forgot about our shopping trip, didn't you?" she pouted.

Oh. That.

"Shit," he mumbled, scrambling from the bed with a blanket in tow, as he ran towards the bathroom, leaving a bewildered Usagi in his wake.

"Sorry, Usako, just give me a few minutes!" he called out, turning the cold shower water on full blast, while he began thinking of hurricanes, plane crashes, and just about anything else besides the blonde on the other side of the door.

To be continued...