It was Mettaton's glorious birthday gala. Every monster had been celebrating at the biggest party of the year, and some spectacles were seen that were never forgotten and some memories were made that must never be spoken of again, and he adored every minute. Undyne got to play with the pyrotechnics. Eventually tho, switching to his EX mode, Mettaton and his sweetest loves let the world party among themselves and retired to a secluded pavilion for a more private celebration -- and he adored every minute as well.
Before one of the warmest nights with his best friends, and before tasting the most... interesting cakes hed ever had, everyone gathered for his gifts: Papyrus ((wearing a special new collection of clothes -- featuring a particularly charming Lover Boy shirt -- you know, to show he cared)) gave him an admittedly amazing, autographed-in-rhinestones, mostly tasteful shirt printed with an image of The Great Papyrus himself; Napstablook, gathering all his confidence, gave him an album of awesome remixes of Mettaton's own music from way back in the day; Undyne and Alphys collaborated on a "kawaii eye mode" upgrade (('collaboration' meaning Undyne had the idea and insisted Alphys engineer it, so they could laugh about it)); Frisk gave him a chic cellphone case decorated with lines of monster and human hearts to symbolize all the "costars" that have refilled his life; Toriel, having become frequent text-buddies and fast friends with him over ((among other things)) both of them dating skeletons, gave him a glittery heart-and-crossbones-shaped cellphone charm to accompany the case Frisk gave him; and finally, Sans was tempted to just give him a card with "happy birthday" written on it in crayon, but decided to go ahead and give him a card with "happy birthday" written on it in crayon, with "bro" quietly tucked in there too.
Mettaton would secretly treasure every one of these things.
Despite the.... cake, Mettaton was feeling almost drunk from all the love through the whole warm party, but a couple hours later, it was finally time for the part he had been looking foward to all day. Papyrus was taking him for a drive through the night, out of town and up the hills, to find a spot overlooking the city and sit together, just the two of them. Saying their sweet good nights, Papyrus and Mettaton left the others to party amongst themselves, Frisk trying to take Dapper Blook for a dance.
Outside, with the glow of muffled laughter behind them, Mettaton watched Papyrus twirl his car keys on his pointy fingers on the way to his car. It made his glittery heart flutter and added an excited, eager bounce to his step, hopping onto the car door and sliding inside before Papyrus even reached it. He crossed his ankles on the dashboard and made himself as appealingly comfortable as he could. Papyrus clicked the key into the ignition, and the car snarled to life. It sounded like a beast of its own, painting Mettaton with a sinful grin that made Papyrus want to slam him against his seat with the force of charging out of the driveway. "Ooooh, yess...."
It wasnt long at all before they were outside of town, gliding along like the wheels were turned on by the smooth, jet-black, moist pavement and just wanted more and more. The smell of rain was so clear on the cool wind rushing past their faces, and the bright moon was reflecting off nearly everything like dormant magic. They were speeding so fast, but it felt like time itself was slowing down, like they had a little bubble of time all their own. Papyrus thought back to when his whole world was shorter than the road they had just taken to get up here. Hed always dreamed of just driving and driving, the wind in his "hair," further than his thoughts could even follow him... Glancing over to the picture of seductive perfection in his passenger seat, he never thought hed be here with Mettaton. He looked back at the road and thought about his amazing fortune. Mettaton noticed those googly eyes starting to form, and heard him quietly "nyeh heh heh-ing" to himself, making him smile and turn the music up louder. Taking one smooth curve, then another, and another, the momentum gently pressed their bodies back and forth with every curve and spilled Mettaton's music ((mostly about how beautiful and wonderful he is -- completely appreciated by the both of them)) into the air, all the way up the hills.
Shortly later they eased to a stop on a cliff, the dirt and stones crunching beneath the tires. After wasting a moment just long enough to set the car in park, Papyrus scooped Mettaton up over the console onto his lap, gently supporting him by his upper back with one hand and resting his other lightly on the small of his back, and blissfully nuzzling all over his face. Such a fantastic face, it might even outshine his own! ...Maybe. He was so sweet and happy Mettaton couldnt handle it, and finally pressed more firmly into him so he had to open up for a kiss. Papyrus was a little surprised but quickly melted back into it, softly pulling him by his back and thigh closer into him. They let time stop and wait for them for a minute, then slowly eased apart just to look at eachother.
Mettaton was smirking, admiring his perfect Lover Boy, when he got an idea. "Oh oh oh oh, wait, do that again!" He snatched another, just as lovely, kiss from Papyrus, then snapped back and flashed his new giant sparkly anime kawaii eyes, shouting "Waaaaaao!!" They both cracked up and Mettaton bumped his forehead onto Pap's neck, snorting and trying to stifle himself. After a moment they steadied their breaths and Papyrus sighed as Mettaton resituated himself to snuggle more comfortably in his arms, and look out over the sparkling city together. Minutes slowly went by with only the sounds of Mettaton's music on the radio, the crickets and nightbirds in the distance, and the subtle rustling of Papyrus' fingers through Mettaton's hair.
After who knows -- after who cares how long, Papyrus lifted one hand and created some little bone-shaped bullets and arranged them into a pattern reading "HAPPY BIRTHDAY! <3" over the cliff, then decided to add a few bone 'volume lines' to make it look 'louder.' Responding with a tiny, grateful nuzzle of his cheek against Pap's chest, Mettaton's joy seeped hotly into the deepest reaches of his circuits, boiling over into a nearly silent chuckle as he raised his own hand to create a mini-mtt-shaped bullet. He made it tap the bones Papyrus had created, then try and suck them into a tiny vaccuum hose. "NYEH!" The words scrambled into a silly skeleton shape that he made run away, but Mettaton's chased it all around and pounced onto it, crumbling them both into a big pile. Laughing together, Papyrus draped his hand over Mettaton's and they aimed around together, rebuilding and playing with their magic like interactive doodles in the air, as Mettaton's songs started and ended over and over on the radio.
They lost count how many songs had played, but at some point, Mettaton had created a little mtt ghost shape out of his magic, and was floating it around with Papyrus' pasta monster, thinking about a long, long time ago. With a sweet, contented grin and sigh, he said, "You know, darling... Ever since the little human came to my stage, and reminded me how good it felt to perform with other people... there have been so many wonderful beauties in my life. And what a fantastic day today was! I feel like all this love could keep my batteries charged forever! But... you were the first, werent you? You had loved and believed in me, before I even did myself." "OF COURSE! WHATS NOT TO LOVE, YOURE AMAZING IN EVERY WAY, YOU EVEN GAVE THE GREAT PAPYRUS SOMEONE TO ADMIRE AND, AND DREAM ABOUT! EVEN BEFORE YOU EVEN HAD THIS SUPER COOL ROBOT BODY!" Mettaton blushed and interlocked his fingers with Papyrus', his magic beginning to faulter. "I want you to know how much I appreciate it, darling..." His mini ghost had slowed down, with a kawaii little blush. Cutting his eyes down to Mettaton for a second with a grin, Papyrus made his bullet skeleton again, made it scoop up the little mtt ghost, nuzzle its "nose," and give it a great big smooch💖