PJatO || Nicercy || PJatO || Percy and the Ghost King of Summers High || PJatO || Nicercy || PJatO

Title: Percy and the Ghost King of Summers High – The Little Merboy and the Vampire Lord

Fandom: Percy Jackson and the Olympians / Heroes of Olympus; supernatural high school AU

Disclaimer: All rights reserved to Rick Riordan for he created the awesomeness that is Nico di Angelo. And everything else related to Percy Jackson and the Olympians / Heroes of Olympus. Aside from the Gods, they belong to the old Greeks. This fanfiction and its OCs on the other hand are entirely mine. No money is made with this, though reviews are more than welcomed.

Warnings: shounen-ai, supernatural, magic, wolves/vampires, mates/bonding, heat, D/s, spanking, explicit intercourse, anal, oral, sex toys, domestic abuse, self-harm, shoujo-ai, hetero, threesomes

Main Pairing: Nico/Percy

Side Pairings: Thanatos/Triton, Octavian/Luke, Ethan/Alabaster, Jake/Will, Frank/Hazel/Leo, Chris/Clarisse/Piper, Thalia/Bianca, Reyna/Annabeth, Lou/Miranda, Charles/Silena, Jason/Calypso, Malcolm/Katie, Grover/Juniper, Dakota/Leila, Nathan/Gwen, Shane/Lacy, Bryce/Drew, Howard/Hecate, Chiron/Lupa, Hades/Persephone, Poseidon/Amphitrite, Paul/Sally, Gabe/Sally (to be past), Poseidon/Sally (past)

Percy Jackson Characters:

Water Nymphs/Sirens/Merpeople: Perseus Jackson, Tyson, Silena Beauregard, Gwendolyn Ryder, Drew Tanaka, Michael Kahale, Piper McLean, Mitchell Logan, Lacy Hunnigan

Vampires: Bianca di Angelo, Nico di Angelo, Hazel Levesque, Ethan Nakamura

Valkyries: Annabeth Chase, Malcolm Cage

Witches: Alabaster C. Torrington, Lou Ellen, Clovis Daver, Butch Walker, Bryce Lawrence

Seers: Octavian Simmons, Ella, Rachel Elizabeth Dare

Storm Spirits: Thalia Grace, Jason Grace

Nature Spirits/Nymphs: Katie Gardner, Miranda Gardner, Leila Fischer, Juniper, Grover Underwood, Dakota Elle, Castor Liber, Pollux Liber

Werewolves/Shapeshifters: Luke Castellan, Nathan McIntosh, Travis Stoll, Connor Stoll, Chris Rodriguez, Cecil Rogers, Frank Zhang (also a hunter)

Dragons: Charles Beckendorf, Jake Mason, Nyssa Black, Leo Valdez, Shane McNabb

Light Elves: Lee Fletcher, Michael Yew, Will Solace, Austin Barton, Kayla Hein

Dark Elves: Zoe Nightshade, Phoebe Burge, Naomi Walters, Celyn Richards, Kinzie Cohen

Hunters: Howard Claymore, Hylla Ramírez-Arellano, Reyna Avila Ramírez-Arellano, Frank Zhang (also a shifter), Clarisse la Rue, Sherman Potter, Mark Meyer

Humans: Sally Jackson, Paul Blofis, Gabe Ugliano, Nancy Bobofit

Animals: Small Bob, Mrs. O'Leary, Argentum, Aurum, Blackjack, Arion, Tempest, Scipio, Guido

Godly Characters: Poseidon, Amphitrite, Proteus, Kymopoleia, Benthesikyme, Rhode, Triton, Hades, Persephone, Thanatos, Olethros, Makaria, Melinoe, Hecate, Demeter, Chiron, Lupa, Calypso

Summary: Percy is just a normal boy, living with his hard-working mother and abusive stepfather, keeping his head low at school. Normally, Percy only spend the obligatory one weekend a month with his dad. But that had been because of Poseidon's secret. Poseidon is a merman and he tried to shield his son from the supernatural world – until it becomes apparent that Percy shares his heritage.

Poseidon fights for custody, with the help of his vampire lord lawyer friend Hades, so Percy would move to them and join their supernatural community. Now Percy has to deal with only seeing his mom on weekends, adjusting to his stepmother and half-siblings and being a submissive merboy.

Percy and the Ghost King of Summers High

The Little Merboy and the Vampire Lord

Prologue : A Not So Ordinary Boy

Percy was just an ordinary kid. Maybe even less than ordinary. He was basically invisible, really. He was an average boy – shorter than most, actually. Black hair, green eyes, maybe tanned skin, muscular but not overly muscular. He doubted he'd never even stand out in a crowd. No, he actually knew he'd never stand out in a crowd because he didn't. No one noticed him. He never made any friends at school, he had always gotten bullied. Now that he was in high school, he knew how to fight back – he had taken self-defense classes in middle school, when the bullying had gotten physical. Since they knew he could fight back pretty good, that stopped. There were still the verbal bullies, led by Nancy Bobofit, the nastiest of them all. And Percy just didn't hit girls, regardless of how much he wanted to beat that dumb chick up. But he didn't. He endured.

"See you tomorrow, ugly-ano", called the vicious ginger after him as he left the school.

And when he came home from school, he continued enduring. He endured the physical and emotional abuse from his stepfather. Had to. He had tried fighting back, when he had learned to hold his own in a fight. Gabe had gotten angry and vented by going after Percy's mom. He'd never allow that again, so he just continued to endure. He was good at that.

There were only three things in life that made Percy happy. One was his mom, because she loved him and she cared for him and she was the only one he had at home. The second was swimming – the only thing he did good. He was bad at school, he was bad at reading and writing and learning, he had no artistic talent whatsoever, but he could swim. He was like a fish in the water, was what his mother told him. He swam in tournaments and won medals left and right. When he was swimming, he was feeling completely free and like there was no pain waiting for him anywhere.

The third thing in his life that he cherished was Tyson Jackson. His ten years younger half-brother.

Because Percy was unwanted. Percy was a mistake and he knew that. His father, Poseidon Jackson, had been separated from his wife Amphitrite when Poseidon and Sally met. It had been a relationship that barely lasted the summer, but had ended with Sally being pregnant and Poseidon rekindling things with the mother of his other five children. By their custody settlement, Percy had to spend every second weekend at his father's place, among his stepmother and his older half-siblings Proteus, Triton, Benthesikyme, Kymopoleia and Rhode. Rhode was okay, she was only two years older than Percy and she was quiet and kind. But he had absolutely no connection to the others. Then Tyson was born and to Tyson, they all were his big siblings, to him, Percy wasn't just the bastard born out of bad judgment on their father's side.

"I'm home", called Percy out shallowly as he unlocked the door.

"About time, bastard. I'm starving, you better cook something good", grunted Gabe agitated.

Just another ordinary day in Percy's ordinary life. He sighed softly and closed the door.

/break\

Amphitrite was making dinner, humming softly to herself. Her youngest, only seven years old, sat on the kitchen counter, watching her avidly. Tyson was a sweet and adorable boy. He was chatting wildly and animatedly about his day at school – every since he had become a first-grader, his life had become so very exciting for the little one. It was just hard to listen to him while the twins Benthesikyme and Kymopoleia were arguing at the table. They were attending college right around the corner together, though they never seemed to agree anything. Their older brother Triton was trying to set the table while glaring at the bickering girls. Between the twins sat Rhode, trying to read a book and finish her studies without getting in the middle of her sister's fights.

"Guys! Come to the living room! Hurry!", called her oldest, Proteus, out loudly.

The other Jacksons exchanged curious looks. Amphitrite frowned and put the pan off the stove before following her children to the living room. Proteus sat in front of the television, with his laptop on the table, half buried in his work as he watched the news. He worked with his father Poseidon and since they normally worked from home, they were lucky their house was large enough for them all. The adult children shared one floor, so did their parents and Tyson, with Percy's room and the office on their floor too. Right now he was pointing at the screen, redirecting their attention to the news. Cheers erupted and they called out for their father to join them.

"Honey! Come, come, your little star is on television!", called Amphitrite loudly.

Within seconds, Poseidon came stumbling down the stairs and stood beside Amphitrite, smiling proudly as they all gathered around the television, watching the news report on Percy Ugliano and the last tournament he won with flying colors. Amphitrite's smile was not as broad as Poseidon's, but it was as proud. The boy had an amazing talent. She knew he thought she hated him, they all hated him, but they didn't. Nothing about the situation around his birth was his fault. Amphitrite and Poseidon had just drifted apart after Rhode's birth, had hardly communicated with each other anymore and decided they needed a break. Sally, the boy's mother, had never been an affair or anything. Amphitrite had known about her, Amphitrite had had her own boyfriend in the time of their separation too after all. But being with those other people was what had made them realize that they loved each other and that they had endured all those years together. They still had many years and hardships they would face together, as one. It was a shame the boy felt as though he was unwanted, but Amphitrite understood why. It must be weird and awkward for Percy to come into this set family, feeling like an outsider. And she also guessed that part of the reason why he felt like he was unwanted was because he only got to spend two weekends a month at the Jacksons'. It probably felt as though they weren't making an effort, like they only spend the time with him that they were obliged to. Amphitrite had raised six children with love and care and she could not picture what it must feel like for a child to feel unwanted. It was upsetting.

"Man, I feel like he's getting faster every time I see him", whispered Kymopoleia in awe.

"And cuter", giggled Benthesikyme. "He must break hearts left and right!"

"He's not getting taller, that much is for sure", grunted Triton amused. "Shorty."

"Aw, but he's our shorty", smiled Rhode as she gathered Tyson in her arms.

"Kym is right", grunted Proteus with a frown. "He is getting faster. Very much faster."

Amphitrite adapted a frown of her own at his comment. It was true, for a human, Percy was incredibly fast. Taking a step closer, she took a closer look. She gasped and took the remote control off the table, pausing the program. The others complained, but she shushed them and knelt in front of the screen, looking closely, very closely. Her frown deepened as she spotted the blue fins.

"He's... one of us...", whispered Amphitrite, resting her fingers on the screen.

There was a reason why they couldn't have Percy around as much as they'd want. They were hiding a very big secret from the boy – from the world. They weren't humans, they were merpeople. Part of the supernatural society that was hiding among humans for centuries now. Back in the old days, they used to live freely and in peace. But humans grew weary and fearful, thinking the supernatural creatures would try to rise. They slaughtered and captured supernaturals, until the supernatural decided to hide themselves, to pretend to be human. They vowed to keep their society a secret from humans, never to be revealed. Every larger city had their secret communities of supernatural creatures and the Jacksons were part of them. It was the secret they had to hide from Percy. The boy they had assumed to be like his human mother so far. Yet here it was, clearly visible. The proof that Percy was not human, that Percy was like them. Fins between his fingers, light, blue scales.

"That can't be...", whispered Poseidon in awe and shock as he knelt next to his wife.

Turning into a full mermaid or merboy was a conscious decision for them. Turning half – with fins, or gills – was just as much a conscious thing for them. But Percy was untrained, he didn't even know what he was – no one had known until today – so it must be a subconscious thing, the will to win the competition. Percy was a merboy, he was part of their supernatural world.

"Does that mean we get to keep him?", asked Benthesikyme eagerly.

"We can't just take the boy away from his mother", chided Amphitrite with a frown. "But we do need to change arrangements and get to introduce him to our world..."

"I'm going to visit him right now!", declared Poseidon like an eager child, jumping up and looking at his wife. "I mean, we could take him in every weekend, right? He should come over soon."

"He should", agreed Amphitrite with a tender smile. "He really should."

/break\

Poseidon had been grinning happily as he walked up to the door of Sally's apartment. He hadn't seen his ex-lover in years. It wasn't that he held it against her; he had left her on her own when she was pregnant with their child. But there had been Amphitrite, who he had shared five children and two millennia of relationship with. And Sally had always known that Poseidon and Amphitrite had been on a break, they had not been divorced. Still, it seemed to be the safest to keep his distance from Sally, she deserved that much. Today was an exception. He wanted Percy in his world as soon as possible. Finally he could see his boy more often. There had always been the risk of accidentally exposing their community to a human, getting Percy involved in something that wasn't his business. But now it was his business – no more hiding. He could take Percy to the beach, could finally include his boy in their family vacations – which had never been possible before, because they always went to the beach to be who they truly were, but they wouldn't have been able to with Percy. Not anymore. No more hiding anything from Percy. Finally, Poseidon could truly introduce Percy to his friends and could teach Percy all the things a young merboy needed to know. He was so eager.

"Sally? Are you home?", asked Poseidon as he knocked.

He frowned then the door opened with a squeak from the force of his knocking. He entered the apartment, figuring that someone must be in. There were sounds coming from a room and Poseidon found himself relieved to have a destination, because he feared if he'd linger in this living room, he'd start questioning things. Like the empty beer bottles all over the place, or the overall condition of the room. Much less of the whole apartment. The last time Poseidon had visited Sally at home had been when Sally had still been living with her great-uncle. The sounds got clearer. Grunts and groans, a slurred voice. Poseidon reached the room and opened the door. His breath hitched. Was this why Percy always insisted on coming to them, not having Poseidon or Amphitrite pick him up?

"What do you think you're doing with my son?!", roared Poseidon.

The smelly fat man quivered in surprise. But below him laid Percy, holding his stomach, curled together in an embryonic position. Percy was in pain and this man was at fault.

/break\

Percy was glaring at the wall. White wall. Boring wall. How much he hated hospitals. But of course his father had come to bring him to a hospital. What had the man even been doing at their place? It wasn't like Poseidon ever bothered with coming to visit. It wasn't like Poseidon cared about Percy. Why bother now? Why make things complicated? Percy knew better than to go to the hospital. They only asked useless questions. Now everything got considerably more complicated.

He hadn't spoken to his father. Not when Poseidon had pummeled Gabe, not during the drive to the hospital, not when the doctors had asked questions. No, that wasn't true. He had told him it was none of his business and that he should forget about it, just like he had forgotten about Percy anyway. Why did Poseidon have to decide to visit now? To get involved now?

Author's note: Sooo, there's the first chap of my new high school AU that I mentioned in "Life at Novus Olympus Academy"! Next chapter will focus on Nico's vampire-side of things, as well as a broment between Poseidon and Hades!