I've been wanted to write this for so long, and I've made some changes while I have been thinking about the story and how it supposed to go. So, this takes place after the Lightning Thief and during the Prisoner of Azkaban. Percy and Annabeth are 11 during TLT, so when the story starts, they are 12; well, at least Annabeth is since her birthday would've passed already (July 12) but Percy's birthday didn't (August 18). I changed this so that it would've worked better. I wanted Percy to be younger than Harry, so it worked out better like this. Oh, this means that Harry, Ron, and Hermione were born in 1993 while Percy, Annabeth, and Ginny were born in 1994. Everything in the PJO will still be the same. For example, TLT quest still takes place in 2005.

Wait, one more thing. The prophecy will be that a child of the Big Three will survive to 15 years old rather than 16 and everyone will be a year younger than they are in the series so that everyone still has the same age gap. For example, once Thalia is saved from the tree, she'll be 14 rather than 15 since she's supposed to be two years old than Percy and Annabeth.

If you have any questions, leave a review or PM me. Now, onwards with the story!

Disclaimer: I'm not a middle-aged woman nor am I a middle-aged man.

Albus Dumbledore, the headmaster of the one and only Hogwarts, strolled up to the front door of the Burrow, intending to meet with the Weasley family about important matters. The old headmaster knocked a few times on the door, then waited for a moment. The oak door opened to reveal Molly Weasley, a short, plump, red-headed witch. As Dumbledore looked down at her, he saw her as a younger witch. The witch who had gone to Hogwarts and stuck out of her common room to go on a late-night stroll with her boyfriend (now husband), though she probably didn't know that he knew. As headmaster, he had to know.

The short woman looked up, only to see the bearded face of Dumbledore. "Oh, Dumbledore!" Molly exclaimed, surprise seeping into her voice as a smile formed on her face. "Please, come in, come in."

The tall man nodded and smiled politely at the red-headed witch. "Thank you, Molly. May I trouble you for a cup of tea?"

Molly lead the way to the kitchen, still smiling. "Of course, Dumbledore. Sit down, please. We've just come back from our trip yesterday. Now we've three weeks left of summer holiday instead of one like we intended." The witch set a kettle onto the old-fashioned stove and lit the fire. "So, to what do I owe you this visit?"

Dumbledore sighed tiredly as he sat down. "Please, bring down the rest of your family. They should all know. It's about Harry."

Molly whipped around to face the headmaster, her eyebrows creased as her motherly feelings for the orphaned boy occupied her mind. "Is he alright? What's happened?" she demanded worriedly.

"No, no. He's fine, Molly," the grey-haired man insisted quietly, a small smile occupying his bearded face. "I shall explain once everyone is down here."

The mother nodded, though her eyes were narrowed slightly in suspicion. "Very well then," she replied, curiosity and suspicion plain in her voice.

Once every member of the Weasley family was downstairs, Dumbledore stood again with a small huff. "Ah, hello everyone," he greeted warmly.

"Professor Dumbledore, what are you doing here?" Ron asked bluntly. "Is Harry alright? Mom told me that it was about Harry."

"Yes, yes, Harry is fine. What I've come to tell you is about Harry's family."

"His aunt and uncle along with their son? Those despicable people," Molly asked, muttering the last part under her breath.

"No, not them. I mean his immediate family. As you know, James and Lily Potter died a year after Harry born. What you didn't know, was that Harry has a little brother, who was two weeks old when their parents died."

Ron's jaw dropped, along with the rest of his family's. "Harry had a little brother?" Ron exclaimed, his voice cracking, both from puberty (XD) and sadness. It was obvious that the Weasley boy felt horrible for his best friend, considering that he himself had many siblings and he couldn't bare to think about any of them being deceased. "You-Know-Who killed a baby?"

Dumbledore shook his head, giving a small smile. "No, Ronald. Harry has a little brother. He was hidden somewhere behind Harry. Voldemort-"-everyone flinched-"-didn't see him when he sent the killing curse towards Harry."

"So," Arthur stammered, trying to make sense of the situation, "where is he now?"

"He is living in the States, with Lily and Petunia's younger sister."

"How old is he?" George and Fred questioned in unison.

"He's 11, turning 12 in a week from today, on August 18th, I believe," Dumbledore replied with a thoughtful expression.

"So he's the same age as me," said Ginny, speaking up for the first time. "I wonder what he looks like," she wondered quietly.

Dumbledore glanced at the young Weasley girl. "Well, last I saw of him, Ginny, he looked very similar to Harry. He has raven-black hair and green eyes."

Ginny's face turned as bright red as her long hair, not have been expecting to be heard. "Will he be coming to Hogwarts?" Percy asked, raising a red eyebrow.

"Indeed he will, Percival. I've decided on putting him in your year, Ronald, along with Ginevra. We will also pick up his best friend. She is a witch as well."

Ron and Ginny's eyes lit up. "Really? This is great!" Ginny exclaimed excitedly, while Ron grinned. "So now I'll get my little sister and Harry's little brother in my classes? Oh yeah, and his friend?"

The old headmaster chuckled. "Yes, Ronald. And Ginny, you, Harry's younger brother, and his friend will be caught up with everything you were supposed to learn in your second year—although they need to learn everything in their first year as well—during these last three weeks of holiday. You will learn about six months' worth of your second year, and the rest will be taught after classes have ended for the day."

"How is that possible?" Ron inquired incredulously.

"Magic," he responded simply.

"Right," the youngest Weasley boy grumbled.

"What I've come to ask is whether or not I could take Ronald and Ginevra along with me to get the youngest Potter and his best friend? We will be picking Harry and Hermione up on the way."

"Oh, of course you can, Dumbledore. It's best that he and his best friend feel as comfortable as possible to come to another country for a wizarding school," Molly reasoned, nodding.

"What's his name?" asked Arthur curiously.

"His name is Perseus Jackson. His name was previously Perseus Sirius Potter."

Molly chuckled nervously, her eyes widening a little. "Sirius, as in Sirius Black, the escaped convict?"

"Yes, Molly," Dumbledore confirmed gravely, the smile melting off of his face. "You must remember, Sirius Black was and still technically is Harry and Perseus's godfather. I'm afraid that Sirius will search for Perseus as well as Harry to, uh, finish the job, I guess you can say, so I believe that it would safer for him at Hogwarts. So, we must get going immediately. We'll be using Side-Along apparition."

The two youngest Weasley children groaned in response. "I throw up almost every time," Ron complained, scrunching his nose up.

Arthur chuckled, very obviously amused. "Those two dislike Side-Along apparition very much, if you couldn't tell, Dumbledore. Good luck, kids."

Ginny stuck her tongue out at her father in response while Ron glared at him. Molly gave her two children kisses on the cheek, smiling as she pulled away. "Say hello to Harry and Hermione for us!"

"Alright, bye, mom!" Ron said as he and Ginny were waving at their family.

Dumbledore waved at the family as Ron and Ginny walked up to them. "Come now, children. Hold on to my arm tightly."

And with that, they apparated to the Granger home. Ron and Ginny fell to their knees in unison. The Weasley girl had to suppress a gag while Ron didn't even try holding his gags back. Once they felt a little better, they stood and saw that they appeared outside of a small, but cozy-looking home that look almost exactly like the other houses along the street. Dumbledore, along Ron and Ginny, walked up to the wooden door. Ron knocked on the door.

A tall, brown-haired man known as Mr. Granger opened the door and smiled politely. Dumbledore smiled back before opening his mouth to speak. "You must be Mr. Granger. I am the headmaster of Hogwarts and these two are her friends, Ron and Ginny Weasley," he explained, introducing himself and the two children with him.

Mr. Granger nodded. "Yes, I remember you two. Hold on, one second." The man leaned back into his house. "Hermione!" he shouted. "Your headmaster and friends are here!"

"What? Professor Dumbledore is here?" Hermione shouted in surprise.

"And your friends," Ron muttered, rolling his eyes at his witch friend.

The brunette came rushing down the stairs, panting when she stopped at the front door.

"Hermione, what have we told you about running down the stairs?" he scolded, though his voice wasn't stern and there was a warm smile as he looked down at his daughter.

"Sorry, dad," she apologized half-heartedly, grinning. "Hi, Ron. Hi Ginny," Hermione greeted them, giving them each hugs. "Hello, Professor Dumbledore. May I ask, what are you doing here?"

Ron grinned. "Apparently Harry has a brother!"

"What?!" the brunette shrieked. "Harry has a brother? But... but how?"

Ginny shrugged, still not that sure about it. "Apparently he's my age. He was hiding behind Harry when Voldemort just the killing curse towards him. Then, while Harry was sent to their aunt in London while Perseus got sent to their aunt's house in New York."

The muggleborn witch sighed. "So I'm assuming that we're going to go pick him up now?"

Dumbledore smiled, his eyes twinkling at his students. "Correct you are, Hermione. We'll go pick Harry up, then we'll be on our way to New York. Do you mind me taking your daughter with me, Mr. Granger?"

"No, of course not," Mr. Granger replied, still smiling. "Be safe, Hermione."

"Bye, dad!" Hermione said, waving.

"Right then, grab onto my arm, you three. We'll be using side-along apparition, Hermione."

Then, the group of four disappeared, leaving a shocked Mr. Granger behind. The four arrived at 4 Privet Drive, right along the sidewalk. They arrived just in time to see Harry pointing his wand at his uncle, who was looking a color close to pus in his anger. Harry was panting as he angrily said, "I'm going. I've had enough."

The young wizard walked out the door, still panting. "Harry?" Hermione asked tentatively.

The boy in question looked up, looking like a deer caught in the headlights. "Hermione? Ron? What are you doing here? Wait, Ginny? P-Professor Dumbledore?"

Hermione ran up to her friend and hugged. "Harry! Are you alright? What's happened?"

Harry dropped his trunk and carefully set Hedwig's cage down onto his trunk. He hugged the brunette back, squeezing his eyes shut and still panting slightly. "I'm alright," he told her as they separated. "I accidentally made my aunt bloat because she kept insulting my parents." Harry clenched his fists in anger before continuing. "Then, I left, because I don't want to be expelled from Hogwarts."

Dumbledore smiled gently at his student. "Harry, that is accidental magic. It happens all the time with children when they experience an extreme emotion. I should go... fix your aunt, and then I'll explain to you and Hermione," the headmaster stated before going inside the Dursley household.

"Explain what?" Harry asked, confused.

Ron opened his mouth to speak, but Hermione slapped her hand over his mouth before he could. "I think we should let Dumbledore tell you," she told Harry, glaring at Ron and stepping on his foot. "I mean, I didn't even get the full story. I presume that Ron and Ginny were told along with the rest of their family. Am I correct?"

The two Weasley siblings nodded in unison. "Yep!" Ginny confirmed.

They fell silent as Dumbledore stepped out of the Dursley home, shutting the door as he did so. He walked towards the group, talking at the same time. "Well, I should explain what's going on. As you know, Harry, your parents died a year after you were born."

Harry narrowed his eyes slightly as Dumbledore stopped in front of the group. He did not want to talk about his parents right after the entire ordeal with his aunt and uncle. "Yes, and?"

Dumbledore obviously sensed his anger because he hesitated before he spoke again. "What you do not know, is that you had a little brother who was two weeks old when your parents died."

The young wizard clenched his fists in anger and growled out, "I had a little brother?! VOLDEMORT KILLED MY BABY BROTHER?!" As he shouted, the mailbox near him exploded as a result of his rage. At the name "Voldemort," Ron, Ginny, and Hermione flinched in unison while Dumbledore remained stoic.

"No, Harry. Your brother is still alive today."

That's it for this chapter! I originally wrote about 4,000 more words for this chapter, but I decided that it was too long for a first chapter and that I was rushing it. Like, Harry met Percy already and they were about to leave to London. One of the many things I have to learn about writing is pacing the story. If you've read chapter two for the Gohan in Middle School story, it's very clear how much it's been rushed just because I don't know how to pace properly and I'm excited to get to the more interesting parts. By the way, I'm still working on the Gohan in Middle School story, chapter three. Just know that I haven't forgotten about it at all. So see you guys on... Do I have an upload schedule? Well, for now, I'll post on Saturdays if the chapter is done. Bye!