Chapter Text
1.
If you were to ask Percy Jackson how it all began, he would reply with a simple “training, lots of training”. In his defense, he never thought sword fighting practices could be that good until Jason Grace spent so much time at Camp Half-Blood.
After the whole war of the giants thing, the Romans and the Greeks began to interact a lot more, causing Jason to spend months in the Greek camp and, consequently, getting closer and closer to the son of Poseidon.
They had developed a strong bond on the mission of the seven, having shared similar stories (amnesia due to the plans of a goddess, absent parents, the end of a relationship...).
Ah yes, the end of a relationship. You see, Percy and Annabeth have known each other since they were children, they grew up together while fighting to save the world and became best friends, they really do love each other, but not in the way they thought they did. A romantic relationship didn't last long between them, and they decided to continue as they had always been: friends.
The same happened with Jason and Piper, the fact that they started dating because of Juno's plans for a prophecy certainly affected them greatly. They tried to go through with it, but they couldn't shake the feeling that they were being dependent on false memories, feelings planted by a selfish goddess. They remained friends, of course, Piper was like Jason's platonic soul mate and second sister.
Given this, you can expect that it came as a shock to most of his friends when the girls started dating months later (except for Leo and Nico, who seemed to have great gaydar). Everyone was so happy for both, seriously, Percy had never seen his friend as radiant as she was now.
The point was that the boys were getting closer and closer and started doing various activities together, such as the demigods' daily training session. It wouldn't be a big deal, they'd always done it together since they'd started their friendship, but of course Percy, with his high ADHD, couldn't pay attention to anything else during training but Jason.
He wasn't paying attention to his movements with the sword, powers or anything like that, but rather to how Jason's shirt was getting tighter and tighter as the workout went on, sticking to his defined chest as he sweated, his arms with biceps so muscular that they almost burst through the camp uniform, his shaggy blond hair that Percy would love to get his hands on, and then would squeeze and pull while Jason sucked his-
— Percy? What's up, man? — it was Jason talking to him, one eyebrow arched as he lowered his sword, gods how the hell can he be so handsome? — Would you like some rest? I'll beat up the training dummies while you have a drink of water and everything, did I tire you out?
There was something else about the man that made the son of Poseidon's legs shake, his smile when he teased him at the same time as he showed so much concern. He had to answer him so as not to seem stranger than he already was, but what was wrong with him? All he had been thinking about for the last few days was Jason, Jason, Jason, Jason...
— Ah... It's all right. I just, I don't know, I'm too tired today — He forces a smile onto his face as he sits down on one of the benches in the corner of the arena, the blond looking a little worried
— I'm just going to stay here for a few more minutes to beat the time of day, a quick thing, then I'll go with you, if you're not feeling very well then it's no fun, man — he looked genuinely concerned, Percy nodded in agreement and picked up his bottle of water to drink, watching Jason return to the arena for another ten minutes or so.
Percy may have looked like one, but he wasn't an idiot. He knew very well (or almost) what was happening to him, but he doubted very much that his friend saw it the same way. Jason was kind to everyone, treated everyone very well and was respected. He had several admirers spread across both camps, since as well as having a wonderful personality, he was extremely hot.
He had everything you could imagine in a romance movie protagonist, Jason is tall, six feet tall (exactly two centimeters taller than Percy), he has wavy blond hair that reminds Jackson from the beach sand, he was big and strong with well-defined muscles and deep blue eyes behind his black-framed glasses.
Percy realized he was doomed when he had his first wet dream about his friend a few weeks ago, demigod dreams were always very detailed, and this time was no different. They were in a bathroom; Jason was bending Percy over the sink as he fucked him with all his might. He moaned and whispered in his ear things like “You like it when I do that, don't you? I take you from behind and turn you into this mess”, ‘You're so hot moaning my name’ or even several ‘Come for me, baby, you want it so bad...’. He woke up startled, incredulous, very horny and with an equally hard cock, as well as embarrassed by the sounds he himself made in the dream.
So yes, maybe, just maybe Percy Jackson had a crush on one of his best friends, but that's just a possibility, remember that.
He tried to ignore it, he really did, he didn't want to ruin the friendship he'd worked so hard to build, since at the end of the day, it was nothing more than a purely carnal and impure desire that arose simply because the last time Percy had done anything like that was with Annabeth over a year ago. He wouldn't try anything with Jason, a straight guy with several suitors, just because his dick can't stand still every time he thinks about him.
Time passes much more quickly when you're having a little gay crisis, so Jason comes back to talk to him, picks up his things, and heads off with his friend to the training ground.
— Everything okay, Percy? You're more distracted than usual these days. — And here he comes again, the overly attractive goodness is with us in the room
— Relax, I'm just a bit tired,” he said.
— If you say so — he clearly didn't believe him, Percy had never been good at telling lies, — can I have a bath in your cottage? The Stolls put paint in my shower, again.
Percy laughed merrily, remembering Connor and Travis Stoll's first prank where the brothers made the Roman turn his hair blue for a few days.
— Of course you can, even though I think you're charming with your blue hair — he scoffs and swears that for a second he saw Jason's face turn redder than it already was from training, it must be in his head.
And to no one's surprise, once again Percy didn't think things through before planning. When you let someone take a bath in your house, the chances are high that you'll see them with just a towel over their body, especially if you're both men, since what would be wrong with two guys seeing each other like that? They've already bathed together at the spa with their other friends, so it wouldn't be a problem, would it?
Well, not when you've been dreaming about this man fucking you for literally weeks. Percy showered first, at Jason's behest since he “needed more”, he did it quickly, not wanting to give himself any more room to think, and then it was his friend's turn as he put on comfortable shorts and a T-shirt.
And, by the gods, nothing prepared Percy for the sight he saw after Jason came out of that bathroom. He was divine, a real dazzler to look at. And he must have noticed Jackson's stare on him, blushing a little.
— My eyes are up here — he joked, but it was different from the other times, there was something more in his tone of voice
— Ah... I'm sorry... — Percy was at a loss for words at the moment, his brain usually works quickly in tense scenes when they involve fighting or running for his life, but it doesn't work so well when Jason Grace is standing half-naked in front of him using that tone of voice.
- Fuck, I'm sorry, but I'm tired of waiting.” It was the first time he'd heard a swear word come out of his mouth like that, but he barely had time to process it, because the next second Jason's lips were glued to his, his large, firm hands placed one on either side of his face. Percy didn't have time to be shocked either and returned the kiss as quickly as he could, wrapping his arms around the taller man's neck, his throat letting out a low, indecent noise as the blond's tongue invaded his mouth.
Don't blame him for sounding so desperate, he was an almost eighteen-year-old sexually repressed teenager who was having to deal alone with dreams that made him so horny for his friend and barely able to satisfy himself, so yes, he wouldn't turn down the offer and throw himself into any little opportunity he saw.
And that was much better than he had imagined in his masturbation sessions under the shower or in his bed at night. The kiss was desperate and full of panting breaths, Jason's right hand left his face to grab his waist and bring him closer, gluing their bodies together. Percy moaned at the contact, lowering his hands to his friend's toned chest, scraping his nails and squeezing the flesh as he always wanted to.
Both would be lying if they said that this wasn't the best kiss of their lives, they were hungry, biting their lips and sucking on them as if they were saying fuck, finally!
The closeness allowed him to feel Jason's erection growing behind the towel, which woke him up from the trance that had enveloped him for the moment. He stopped the kiss and looked him in the eye, trying to take in everything that was happening and failing miserably.
— What's wrong? — He asked, his lips red from the light bites and his hair still wet from the shower making Percy shiver. — You don’t want it anymore?
— It's not that — he sighs — it's just that... everything's casual, isn't it?
— Of course.
There wasn't much conversation after that. Percy felt that maybe he had done the wrong thing, Jason didn't complain, but that little guilt stayed in his head for the next few days.
After the short exchange of words, things became more and more blurred in his memory, but he remembered very well the part where he sat on Jason's lap on his bed while his friend masturbated their dicks simultaneously while marking Percy's body, biting him, sucking him and painting purple marks on his shoulders and chest, taking care not to leave them visible on his neck.
It didn't take long for Jason to get a lot of scratches on his strong arms, Percy taking all the pleasure he felt from the throbbing in his cock and the marks on his tanned and toned skin out on his friend, moaning quietly for fear that some camper passing by outside his chalet would hear what they were doing there.
They climax almost together, painting their bodies with cum, breathing heavily without the courage to look into each other's eyes. The realization of what they've done falls away after the cloud of horniness dissipates, I've just fucked one of my best friends.
Eventually they must get up, clean up again and get dressed, which turns out to be more embarrassing than the act itself.
— Hey man — Jason catches his eye, putting on his spare camp uniform — Was it just this once?
Did he want it to be just this once? Now, knowing that the blond was physically attracted to him and having all those scenarios in his mind... no. He wanted more.
— If you want to do it more often... we can do it with no strings attached and all that shit — he proposed, leaning back against his dresser - It won't change anything about our friendship, will it?
— Of course not Percy! You're one of my best friends — he says quickly, putting on his glasses.
Then they said goodbye and went back to their normal activities, or at least Percy tried to, the scene running through his head over and over again, the slight discomfort of the strongest bite on his shoulder reminding him that it was real. They really did it and said goodbye as if it were nothing.
They didn't kiss goodbye, of course, that wouldn't have been casual at all.