Archive of Our Own ^beta

Chapter Text

Eclipse couldn't believe that he was doing this. He shouldn't be here, yet here he was. Standing outside the house of his former enemy.

He had made sure no one, except a certain Sun animatronic, would be in the house. Moon would be working on something in his lab for hours, Lunar had already left for space, and Solar had taken Jack and Dazzle to go to the zoo. It would just be the two of them.

‘I can't believe I’m doing this,’ Eclipse thought. Despite that, he knocked on the door. After a few minutes, Sun opened the door.

“Who is-,” Sun stopped when he realized who was outside.

“What do you want, Eclipse?” Sun asked, upset that the Eclipse model was in front of his house.

“I want to ask you something,” Eclipse stated.

“You can ask it out here,” Sun replied. He didn't want Eclipse inside his house.

“I would rather us have this conversation inside,” Eclipse said, annoyed. If it weren't for the fact that he was so pent up, he would've left.

“Fine,” Sun groaned. He opened up the door, letting Eclipse, before closing it.

“So what did you want to ask that was soooo important that you needed to-,” before Sun could finish speaking, Eclipse cut him off.

“I need you to fuck me!” Eclipse nearly yelled. Sun just looked at him confused.

“What did you just say?” Sun couldn't believe what he was hearing.

“I've been incredibly pent-up, and there’s no way I was going to ask anyone from the other dimension to have sex with me, so I figured it was worth a shot to ask-” Eclipse stopped himself when he saw a look in Sun's eyes.

“Why are you looking at me th-Aaah,” Eclipse couldn't even finish his sentence before Sun threw him over his shoulder and carried him into his room, throwing him onto the bed, shooing the cats out, and slamming the door before pinning Eclipse down to the bed.

“I don't think I heard you right downstairs. What did you say again?” Sun had a dark look in his eyes and a small smirk on his face, like he already knew what Eclipse had said, but wanted him to repeat it for his own amusement.

“I said I need you to fuck me. I don't care how rough you decide to be, I just need to be fucked,” Eclipse stated. Sun's smirk grew before Eclipse realized that he could've worded that better.

“You NEED me to fuck. You, the prideful, stubborn Eclipse, absolutely NEED to be fucked by a dumb, cowardly Sun like me. And you said I could be as rough as I want? You must be DESPERATE!” Sun said that in the most mocking tone ever, but Eclipse couldn't deny it. He was, in fact, desperate to be fucked by the one person he caused the most suffering to.

“Stay there,” Sun said, darkly. Eclipse, still shocked by his switch in demeanor, listened and didn't move while Sun went to his closet to grab something.

‘As rough as I want, huh?’ Sun thought, ‘Well, this might be a good start.’ From the closet, Sun pulled out some red rope and a paddle. A few weeks ago, he had found out that not only did he have an interest in BDSM, he also was something of a sadist. He found enjoyment in bringing his partners pleasurable pain. It gave him a sense of control that he never felt before.

He closed the closet and walked back over to Eclipse, who was still lying in the same position he was left in.

“Awww, what a good boy! Listening to me so perfectly!” Sun cooed at him. Eclipse knew that he was belittling him, but the praise made his mechanical heart flutter.

“Alright, sit up. We need to go over some things,” Sun said. Eclipse sat right up, and then internally cursed at himself for being so obedient.

“I'm agreeing to be rough with you, but we still need a safeword system. There's a difference between rough and being an outright asshole. Do you understand?” Sun asked. Eclipse just nodded, wanting to hurry this up so Sun can just fuck him already.

“The easiest one would be the traffic light system. Green means that you're alright to keep going, yellow means you need a moment before you can keep going, and red means that you need me to stop completely,” Sun explained. “If there's ever a time where your mouth is occupied, I will give a squeaky toy for you to squeeze. One squeak means you're good, two means that something is making you uncomfortable and you need me to fix it, and three squeaks means you need to stop fully. You got that?” Sun asked. Eclipse nodded, stunned. He was unaware that so much went into stuff like this or that Sun seemed to have experience with this stuff.

“Now that that's done, can I kiss you?” Sun asked. Eclipse nodded, not trusting himself to speak. Sun pressed his lips against Eclipse's, Eclipse's eyes widening before he closed them and started pressing into the kiss. Soon, it turned into making out, their tongues twisting and dancing together. Eclipse was the one to pull back, getting overwhelmed by the combined heat of their mouths, a string of drool connecting between them. Eclipse looked flustered while Sun just licked his lips.

Sun pushed Eclipse back down before getting on top of him. He took off Eclipse's pants and started nibbling at his neck pipe, drawing small whimpers out of the darker animatronic. Once he was proud of his handiwork, he moved on to his rays. He started caressing Eclipse's rays, making his whimpers turn into small moans, before yanking on one of them, causing Eclipse to yelp. Sun looked at the bot underneath him, slight worry on his face before it was replaced with the same sadistic look after realizing that he enjoyed the rough treatment.

He continued pulling on his rays, and started biting at them, causing Eclipse to start slicking up underneath his modesty panel. Once he finished the assault on Eclipse's rays, he started moving lower, sucking and biting at different parts of his body, pushing the other animatronic closer and closer to edge. But once Sun got to Eclipse's modesty panel, he moved back and stood up, causing Eclipse to let out a pitiful whine for more.

“Be quiet. Unless you DON'T want me to tie you up?” Sun questioned. Eclipse furiously nodded his head, wanting to know how Sun would tie him up. Sun picked up the rope before turning back to Eclipse.

“What's your color, Eclipse?” Sun asked. The next part was going to be a little more intense, so he wanted Eclipse's explicit consent.

“Green,” Eclipse answered. He knew consent was important, but he really wanted to get going. Sun could sense his impatience and in response, he decided that instead of just tying his arms together, he was going to do full on shibari. He got started on a full on karada style, every knot that got completed making Eclipse squirm in excitement and whine about it taking too long. His whines fell onto deaf ears because Sun kept going at his slow and leisurely pace, reveling in the impatient whines.

Once Sun was finally done, he took a step back to admire his handiwork and he had to admit, Eclipse looked good. The rope perfectly accentuated his slight curves and red was most definitely his color. Speaking of red, Eclipse could tell that's the color his face would be turning if he could blush.

“Alright, you got me tied up. Now can you get to fucking me already?” Eclipse's patience was wearing thin. He was done with Sun taking his sweet time with this.

“Alright. Turn around. I want you on your knees,” Sun said. While Eclipse was getting into position, Sun grabbed the paddle. If Eclipse was going to act like a brat, Sun was going to discipline him like one. Once Eclipse got into position, he couldn't even open his panel before Sun spanked his left flank with the paddle, eliciting a surprised yelp from Eclipse.

“What the hell, Sun?” Eclipse asked, turning his head to look at him.

“You came to MY house,” Sun started, smacking Eclipse's rear with the paddle again, “DEMANDED that I fuck you,” Sun smacked him again, “and then you have the AUDACITY to act impatient and bratty about something I don't have to do for you,” three more smacks come. “It's not like I owe you anything, in fact, YOU owe ME more for all the things you've done to me and my family.” There was another smack and then, Sun got a wicked idea.

“How about we actually count out things you've done to hurt me and my family? For every smack I give you, you keep count and say sorry after every one. If you do good, I'll give the fucking you so desire. How does that sound?” Sun tauntingly asked.

“Gr-green,” Eclipse stammered out. The pleasure of the smacks was overwhelming, but he was using the last bit of willpower he had to try and keep his modesty panel closed AT LEAST until Sun decided to start fucking him. Sun took that to mean Eclipse was alright and got started.

“O-one, I'm sorry,” Eclipse stuttered out. Smacks kept coming and coming, increasing in strength and speed. Soon, Eclipse was nothing more than a crying, drooling mess. It was so painful, yet so pleasurable at the same time. Soon, Eclipse stammered out the final number.

“TH-THIRTY, I'M SORRY!” Eclipse cried out. Eclipse froze as he realized there was something running down his legs.

“Wow, how much of a whore do you have to be to cum from getting spanked?” Sun asked, amazed. Eclipse grew horrified as he realized that at some point during the assault of smacks, his modesty panel opened up, and he became more horrified at the fact that he had come just from Sun spanking him.

‘I knew I was a masochist,’ Eclipse thought, ‘but I wasn't expecting that I was this much of one.’

“Oh well,” Sun said, “I guess I have to make good on my promise. Eclipse, get onto your back.” Eclipse turned over and laid down, relieved that he was finally going to get what he came here for. Just as Sun took off his pants, grabbed the lube from his drawer, and was about to put it on his fingers, Eclipse stopped him.

“Y-you won't need to do that. I'm already prepped,” Eclipse used his fingers to spread himself to show he was telling the truth. Sun's sadistic smirk came back tenfold.

“You really didn't want to wait, did you?” Sun asked. “You wanted me in your cute pussy so badly that you prepared yourself before you came here. I guess there goes foreplay. Oh well, you came for the main event.” Sun opened his modesty panel, revealing his cock, and began to cover it with lube. Once he deemed that he had used enough, he lined himself up with Eclipse's pussy.

“I'm going to ask you this before I put it in, what is your color?” Sun asked. He wanted to make sure Eclipse still wanted this.

“The greenest of greens. Now, put that in me before I do it mysel-Aaahh!” Eclipse couldn't even finish his sentence before Sun shoved his cock into him, causing him to moan. Sun would've been gentle, but Eclipse specifically asked for rough, so that was what he was gonna get.

Sun started roughly thrusting into Eclipse, immediately setting a hard and fast pace, making the other moan loudly. You could hear sounds of metal slamming against metal and Eclipse's moans from anywhere in the house, which made the two so glad that nobody was home. Soon, Eclipse could feel another orgasm building up.

‘H-harder, p-please Sun, harder~,” Eclipse moaned out. He was so close, he just needed an extra push.

“Well, how can I decline when you ask so nicely?” Sun asked, thrusting into Eclipse even harder.

“Yeeessss! Oh fuck, oh fuck, OH FUUUCCCKK!!” Eclipse moaned loudly, receiving his second orgasm of the afternoon. Sun paused only for a second before going back to thrusting.

“Wait, I already came! Stop, STOP!” Eclipse screamed.

“What's your color, Eclipse?” Sun asked, sternly. “W-what do you-” “Eclipse, WHAT is your color?” Sun asked again. “Green, it's green!” Eclipse shouted, shaking from the overstimulation.

“THEN, BE QUIET!” Sun yelled, “Besides, you asked for this and I haven't even cum yet.” Sun continued thrusting into Eclipse, with the latter not having the strength to do anything except take it and moan.

Eventually, Sun's hips started stuttering in their thrusts.

“Eclipse, I'm getting close. Do you want it inside or outside?” Sun asked through labored breaths.

“I-inside!” Eclipse moaned. Sun sped up his hips, desperately chasing release. Eclipse's hands flew to Sun's back, claws popping out and digging into Sun's casing, which only encouraged the yellow bot to go faster.

After a few more thrusts, Sun came inside of Eclipse, granting Eclipse his third orgasm of the whole ordeal. They both flopped down and basked in the afterglow for a bit before Sun pulled out, causing his flavored lube cum to spill out of Eclipse, the entire room filling with the scent of lemons and butterscotch, and eliciting a final moan out of Eclipse.

Sun took a moment to look at him and, boy did he look wrecked. There were bite marks on his neck pipe, his rays, his thighs, his eyes were hooded, and he was drooling uncontrollably. Sun felt a swell of pride looking at him. HE did that. He made the prideful bastard, Eclipse, his bitch and he was proud of it.

Sun carefully undid the ropes, setting them aside to be cleaned. He then went to his bathroom to prepare a bath for him and Eclipse.

“I don't need you to pamper me,” Eclipse said, annoyed once he regained his senses.

“Aftercare is an important part of BDSM, it makes the Sub feel cared for, which is especially necessary with the session we just had,” Sun stated, matter-of-factly. Eclipse relented, as he knew he wouldn't be changing Sun's mind, and tried to stand up to walk to the bathroom, only for his legs to start shaking uncontrollably.

Sun laughed, “You need some help?” Eclipse flipped him off, but Sun still helped Eclipse steady himself and walk to the bathroom. He placed Eclipse in the bathtub, went down to put his bedding to wash, and joined Eclipse in the bathtub. Sun lathered his hands with soap and started gently scrubbing down Eclipse, a contrast to how rough he had been earlier.

“Soooo, how'd you like it?” Sun asked. “It was good,” Eclipse replied, “I'd like to do it again, sometime.” Sun looked at him, dumbfounded.

“Don't get me wrong, I still hate you and I KNOW you definitely still hate me, but maybe that's why the sex was so good. We don't have to like each other or be in a relationship. All we need is a mutual agreement to hate-fuck each other, with no strings attached. No pet names, no kissing outside of sex, no meeting each other's kids, just you, me, and wherever you decide to fuck me,” Eclipse said.

“So, like friends with benefits?” Sun asked. “Something like that,” Eclipse replied. “Sounds good to me.” “Alright.” The two finished cleaning themselves, dried themselves off, and headed back to Sun's room.

Eclipse put his pants back on and the two exchanged numbers with an agreement to not contact each other outside of sex unless it's an emergency.

Eclipse left the house and opened a portal back to his dimension, both of the two satisfied with their new arrangement.

Chapter Text

It had been a couple of weeks since Sun and Eclipse started their “arrangement”, and they both were pleased with the results. It was a good outlet of stress relief for the both of them, being able to just send a text about a location and fuck as rough as they desire.

One day, they were taking a bath after a particularly intense session when Sun asked a question.

“Why exactly DO you have a vagina, Eclipse?” the yellow bot asked. His question was met with a look that just said ‘Are you seriously asking that?’

“I don't mean it in a weird way,” Sun clarified. “I'm just asking why you went with that instead of a dick?” Eclipse sighed. It made sense why Sun was surprised, but he thought that that was too personal a question to ask your hate-fuck buddy.

“If you don't wanna say, you don't have to,” Sun said, sensing Eclipse's tenseness. “I was just wondering how I ended up with the pleasure of being able to fuck that pussy whenever the mood strikes me.” The softness of his Sun's tone contrasting with the dirtiness of his words gave Eclipse whiplash.

“Most Eclipse models have female frames,” Eclipse said. “Despite the fact that I identify as male, my systems function the same way Earth's do. I can't get rid of my vagina or else my body will have a meltdown. Same reason I can't give myself a dick, my systems won’t know how to function with one.” After hearing that, Sun was surprised to say the least. At least he knew why Solar was hiding pads under his bed now.

“Does it feel dysphoric? Identifying as a guy and having the parts of a girl, I mean,” Sun asked. Eclipse knew he didn't have to answer and that Sun wouldn't push his luck, but he felt like he was alright being vulnerable.

“It can be at times, but I'm a guy at heart to myself and that's all that matters.” Eclipse said before muttering, “Even if some dumbasses try to say otherwise.” Sun heard him, but pretended like he didn't. That shouldn't concern him. Him and Eclipse were just fuck buddies, right? But then, why did he feel so angry about the idea of someone insulting Eclipse? Sun shook his head. He was probably just upset about the fact that those people were being transphobic.

After they finished their bath and started getting dressed, Sun took a breath and asked Eclipse something. “Do you think you could come to game night tomorrow?” Eclipse gave Sun another one of his dead stares.

“I thought part of the agreement was not to hang out with each other outside of sex?” Eclipse reminded Sun. “I know, but….,” Sun started. “But what, Sun?!” Eclipse was losing his patience.

“Moon found out my “visits” to your dimension,” Sun admitted. “WHAT?!” Eclipse couldn't believe it. Moon knew now. ‘I'm never going to live this down,” Eclipse thought.

“Before you start spiraling, Moon doesn't know that we're hooking up. I told him that I've been becoming friends with you for Earth’s sake and he suggested inviting you to see if you can be civil,” Sun clarified. Eclipse breathed a sigh of relief before immediately scowling again.

“So, I have to go to a game night with you, a nuisance, a copycat wannabe, an overgrown lizard, and Earth?” Eclipse said, with the same level of annoyance he said most things with. “Jack and Dazzle will also be there, and maybe Molten. Lunar can't come because of training,” Sun added. Eclipse's eye twitched. They weren't supposed to meet each other's kids. That was the most crucial part of the arrangement. He knew from his own kids that if a kid sees someone that seems to be close to their parents, they'll want to see them more often.

“PLEEEASE, Eclipse! Otherwise, Moon will think somethings up!” Sun begged. Eclipse weighed the pros and cons before sighing. “Fiiiiine, I'll go,” Eclipse reluctantly agreed. “Thanks Eclipse!” Sun squealed, lifting the other animatronic into the air with a hug before he realized what he was doing and put Eclipse down.

“Sooooo, see ya tomorrow at 5?” Sun asked, awkwardly. “Yeah,” Eclipse said, clearing his throat. Eclipse opened up his portal and left, leaving Sun in his room alone. They both had a lot of mental preparation to do for tomorrow.

………………………………………………………………..

Eclipse was standing outside Sun's house, dressed in his synthwave shirt and black, baggy jeans. This wasn't unfamiliar to him, the only difference was the context. He knocked on the door and Solar answered.

“Wow, so you DID decide to drag yourself out of whatever Hot Topic you reside in to hang out. I'm honored,” Solar said, sarcastically while moving out of the way. Eclipse rolled his eyes, choosing not to respond, and entered the house. There he saw Jack, a deer child he assumed to be Dazzle, a blob of wires with a mask that was probably Molten, and Moon in the living room, surrounding a Jenga tower. Eclipse guessed that Earth, Monty, and Sun were in the kitchen making food. Moon turned to look at Eclipse.

“So, you decided to show up?” Moon asked before going back to focusing on removing his piece as slowly as possible. “I didn't want you throwing a fit because I declined your invitation, you asshole,” Eclipse responded. Truthfully, Eclipse just didn't want Moon to find out that he was being fucked by his brother. A loud, robotic groan snapped Eclipse out of his thoughts. It seems like Jack lost Jenga.

“Would you like to join us?” Molten asked. Eclipse shook his head. “I'm gonna go see what the others are up to,” Eclipse didn't even wait for a response before heading to the kitchen. There he saw Monty making mac n’ cheese, Sun carrying his cats upstairs, and Earth, in her wheelchair, baking treats for everyone.

“Oh, Eclipse!” Earth called over to him. Eclipse walked over to where Earth was mixing stuff in a bowl. “I'm making cookies, but I forgot to grab the baking powder. Can you grab it for me?” the wheelchair bound animatronic asked. She'd do it herself, but her back hurt too much for her to stand back up. Eclipse shrugged his shoulders and went to grab the baking powder. Which happened to be on the top shelf. He reached to grab it, but just missed it. He reached up again, the action causing his shirt to hitch up. Just as Sun came back down and saw Eclipse's exposed lower back and hips. While Earth and Monty couldn't see it because they were focused on making the food, Sun could very clearly see the imprints of his fingers on Eclipse's hips from their rendezvous yesterday, which caused his glow to turn on and his rays to spin as Eclipse handed Earth the baking powder. Earth thanked Eclipse for the help before turning her attention to Sun.

“Oh Sun, are you alright?” Earth asked. Sun forced his rays to still and turned off his glow. “I'm fine, Earth. Just remembered something embarrassing is all,” Sun lied. “Okay! Just checking,” Earth replied. Eclipse knew that Sun was lying, but didn't realize what he was flustered about until he fixed his shirt and felt the indents Sun left on him that he hadn't gotten around to buffing out. Sun must've seen them when he was reaching for the baking powder. Eclipse smirked, finding it amusing that he was capable of riling up Sun outside of the bedroom.

“SUN AND NOT-FATHER!” Jack called from the living room. “COME PLAY NEVER HAVE I EVER WITH US!” Eclipse was about to decline when Sun grabbed his wrist and pulled him over to the living room.

“You gotta join in the games at some point, Eclipse,” Sun insisted. “Otherwise, what's the point of it being a game night?” Eclipse rolled his eyes, but still sat in the circle next to Sun. Fortunately, he was sitting next to Molten and not Moon or Solar.

“So how does this damn game work?” Eclipse asked. Jack gasped and covered Dazzle's ears. “No swearing in front of Dazzle!” the pumpkin boy exclaimed. “Also, who doesn't know how to play Never Have I Ever?” Moon interjected. “Well, I suppose I had time to learn foolish party games between the scheming, murdering, dying, reviving, being treated like a prisoner, dying again, reviving again, more scheming, trying to resurrect the copycat over there, nearly dying, vacating the dimension, getting adjusted to the new dimension and its inhabitants, helping that dimensions Sun and Moon to be better roommates, tracking down a child murderer, building the kid's new bodies, getting mimicked, watching my co-host die, training my new co-host who is a dead kid who was given Puppet's body and powers, getting my other kids back, and going back to building bodies,” Eclipse said sarcastically. He meant for it to be rude, but everyone just gave sympathetic glances.

“What?” Eclipse asked. “Dude, you've been living a sad life,” Moon said. “Like everything you said was fucked up. At least we have time to do stuff like this.” Eclipse just rolled his eyes again. “Whatever, let's just play the stupid game.” After they explained the game to him, Eclipse quickly got the hang of it. While his lack of experience when it came to leisurable stuff was generally disappointing, it allowed him to take the lead in the game, only putting down a finger when Sun or Molten got competitive (Molten really didn't seem like the competitive type to Eclipse) and asked targeted questions like ‘never have I ever died’ or ‘never have I ever hurt a family member’. The game went on for a bit, Earth and Monty bringing everyone food and Dazzle and Jack had gone to bed. It went up until Moon, who had been losing the game, got a big toothy grin.

“Never have I ever kissed someone,” Moon smugly said. Monty put down his index finger, leaving his middle one up to flip off Moon. Earth gave Moon a disapproving stare as she put down a finger. Solar looked incredibly offended towards Moon and flipped him off. “I told you about me and Nexus kissing in confidence!” the mechanic yelled. Moon just laughed. “All's fair in love and war, Solar!” Moon laughed out. Solar kept steaming and Moon kept laughing until they noticed that Sun was down to 2 fingers on his second hand, and Eclipse had put down his third finger of the game.

“Sun, when did you kiss someone?!” Moon asked. Sun, as far as they all knew, was chronically single. “I decided to have a fun night out for myself and I got a little too drunk. We all make mistakes when impaired, Mr. Married a Stranger in Vegas,” Sun retorted. “More importantly, who in their right mind would kiss Eclipse?” Solar questioned. “I'll have you know that they are a very good kisser, and they are just as insane as me, if not more. So say whatever you want, just don't insult me when you invited me here in the first place,” Eclipse responded. Earth and Sun gave Solar and Moon a look. A look that said ‘you know he's right’. The game went on for a bit longer until Eclipse finally won, shoving his victory in everyone's face.

“Well as fun as kicking your asses in this stupid game was, I have to head home before a search party gets sent out for my ass,” Eclipse said, standing up and stretching. “I'll walk you out,” Sun offered. Eclipse shrugged and Sun got up and walked him towards the door, Earth telling him ‘bye’ as he went. The moment they were out the door, Sun put his hands around Eclipse's hips.

“So I'm a good kisser, huh?” Sun teased. Eclipse's glow clicked on, having forgotten about his earlier statement. “I also said that you're insane, which is true because no sane person nearly gets a boner from seeing the indents they left on someone,” Eclipse tried to deflect. “They do when the indents are on hips as slutty as yours,” Sun said suggestively. Eclipse's glow got brighter before he pulled Sun in for an aggressive kiss. The kiss lasted for 10 seconds before Eclipse pulled away and opened his portal.

“You really are a good kisser,” he said, turning towards the portal. “Next time, you're coming to hang out at my place, got it?” Sun responded with, “Got it,” as Eclipse went through the portal. Sun fixed his clothes and sighed. Eclipse and him really were the same level of insane for doing what they were doing. But he'd embrace insanity if it meant that he could keep slamming Eclipse's face into the mattress whenever he wanted. He thought that that sounded romantic, but he shrugged it off. No way was he in love with Eclipse. He was just a nice piece of ass, and that was it. Sun left off on that thought as he went back inside, rejoining everyone in a new game.