Repulse written by Nikki Pond.

Summary: "WHAT?!" Harry shouted. "Yes. Draco is your twin brother." Dumbledore nodded. Harry Potter does not expect to discover that Draco Malfoy is, in fact, his twin brother. He's not quiet accepted the idea yet, especially when Draco is a Death Eater. He's sure.

Setting: Harry Potter and the Half-Blood Prince. So be warned there are spoilers!
Pairings: None. Except that the pairings mention in the books are canon. Oh, and no slash.
Genre: Adventure, Mystery, Family, Hurt&Comfort, Angst.
Ratings: Rated-T

Author's Note: I was bored. I had this idea ever since I challenge myself to write a fanfic where Draco is actually a Potter. I have only read like 4-5 fanfics that are like that. I recommend you guys read "Thou Shalt Find Kings" by CalamitySnidget and "Changed Fates" by JimBo854. Awesome work with their versions of Draco is a Potter and a twin brother of Harry Potter fanfic. I have a sequel idea but I don't think I plan writing it. Anyway, when I decided to challenge myself I thought of my way and decided that Harry knew Draco is his brother but did not accept it. The interesting thing is that the story is set to "Harry Potter and the Half-Blood Prince". Hehehe. I apologize for some characters are OOC. Writing Dumbledore is difficult. And forgive me of my mistakes. Quiet an interesting title 'Repulse' – I had difficulties choosing the right one.

I still would like to give credit to CalamitySnidget and JimBo854. They inspired me ;)

P.S – You might notice quotes from Dumbledore in previous books, some are combined, and some are implied. I did my best in this fanfic.

P.P.S - Have I mention Draco is my favourite character? This is the first time I have written him in a regular fanfic.

"You don't choose your family." –Desmund Tutu

"You wanted to see me, sir?" Harry asked as he entered the Headmaster's office.

"Yes, but first, how are your classes?" Dumbledore asked politely, who was sitting behind the desk. He gestured a seat in front of him and Harry took a seat.

"OK." Harry nodded. He was wondering why he was called into his office unless it had something to do with the lessons Dumbledore had told him. But it didn't look like since it was scheduled till next week.

"So, Harry," Dumbledore said, "I know I promised you that there would be no secrets between us. But I suppose it is now time that you learn the truth. It is my belief that the truth is generally preferable to lies, but always kept in caution."

Harry waited patiently for him to say something.

"I must confess…I have always suspected it for a long time, but now I know the truth." Dumbledore stood up, his blue eyes does not have its usual twinkle, instead, it was solemn. Harry gulped, nervous.

"Harry, I have never told you something about your parents." Dumbledore said. "You are not the only child."

There was a silence before Harry said:

"What?"

"Harry, your parents, Lily and James, gave birth to twins. You're not the only child, Harry. You have, in fact, a twin brother to be precise."

"A brother?" Harry said, shocked.

"He's also alive." Dumbledore nodded.

"But…how come I don't know this? Somebody should have…WHY didn't you tell me this?" Harry burst out in anger as he stood up, and he felt betrayed for just a moment. How could anybody NOT told him that he has a brother?! And the fact he was alive!

"Harry, please sit down and let me explain." Dumbledore said. Harry took a deep breath before taking a seat. "Lily gave birth to twins on the night July 31st 1980. Fraternal twins, actually. Your brother was born just a minute before you." He smiled, almost sadly. "Your parents were overjoyed. You were quiet close with your brother.

"The night when Voldemort killed your parents, when we came to his house we couldn't find your brother. Disappeared. We assumed Voldemort's followers had kidnapped him." He sighed. "After we gave you to the Dursleys, we have searched for your brother. But we had not found him. Many people declared him dead, killed by Voldemort. But I do not believe so, for I have my suspicions where your brother is."

"You mean you know where he is? He's alive?" Harry said, hope lingering in his voice.

"Yes, Harry. He's alive and I know where he is." Dumbledore nodded. "I'm sorry Harry, I had promised to tell you everything."

Harry stared at him for a moment before he looked away as he took a deep breath. He pushed his bangs to the side, "So where is he? My brother, I mean?"

"Harry, let me tell you, I do not know what happened but I believe one of Voldemort's followers took your brother and raised him. I believe he is not aware of his heritage."

Harry's heart almost stopped. "W-what?" The thought of his brother being raised by Death Eaters and unaware of his relation and the fact that he was being raised to an enemy he despised almost made his blood boiled. How dare they took his brother away from him?! "But why didn't you tell the Ministry?" he demanded.

"Harry, I only have my suspicions." Dumbledore said. "Your brother was raised by one of Voldemort's top Death Eaters, and under a powerful glamour charm. Harry, you must understand that I did my best but the family he-he thought-was raised are powerful and influential. I had observed him when he came to Hogwarts—"

"Wait, you mean he's here? At Hogwarts?" Harry interrupted.

"Yes. Remember Harry, he's under a glamour charm so that no one would recognized him." Dumbledore said. "I couldn't approach him, not until I know for sure he was your brother. It wasn't until this summer that Severus had confirmed my suspicions that it was indeed your brother."

Harry thought of this for a moment. His brother, his twin in fact, was alive and was here at Hogwarts, unaware that he was being raised by the people who Harry detested and who were working for Voldemort, who killed their parents. He couldn't tell what he was feeling right now. There was a mix of joy, anger, confusion, and betrayed. All these years, he had classes with his own brother, and they weren't aware of it.

The truth started to quiet sink in Harry's mind. He had a brother. His flesh and blood. His only family left. Alive. Harry had to control himself from shaking Dumbledore and demanding to tell him where he was.

"So, who is he?" Harry asked.

"Draco Malfoy." Dumbledore said.

Absolute silence filled the room.

"WHAT?!" Harry shouted. His face was disbelief as he stood up.

"Yes. Draco is your twin brother." Dumbledore nodded.

"But-b-but…it can't be him!" Harry shook his head.

"No, he's your brother."

"How can you be sure it's him?!"

"When I learnt the Malfoys have a child just after Voldemort disappeared, I became suspicious. For I am aware that Mrs. Malfoy cannot give birth to children." Dumbledore explained. "Everyone knew at the time that Narcissa cannot give children, but they were shocked to discover the fact the Malfoys have an heir. They had called it a miracle. I had watch Draco time to time, and wasn't sure. Severus came to me this summer and told me he had heard from the Malfoys had raised your brother."

"But he's a Death Eater!" Harry couldn't help but burst it out. Anger rushed through him. He couldn't quiet accept the fact that Malfoy was his brother. It couldn't be!

"Harry, I take all appropriate measures to investigate and to not throw accusations without further evidence. What concerns me is Draco is not aware of this. And, since Voldemort returned, is his use of him."

"What do you mean?"

"I believe Voldemort had planned to use your brother against you." Dumbledore said.

"But he can't be my brother!"

"Silence, Harry he is your brother. I know that this hard for you to take, but you have to understand Draco is not aware of it. He was raised by the Malfoys. And he does not know he is your brother."

Harry shook his head. He still couldn't believe that Malfoy, his nemesis and the one who bullied him for the past five years. He just couldn't. And the thought of his own brother, his only family, a Death Eater. He couldn't believe it.

At first, he was delighted to hear that he had a brother, who was alive, and in fact at Hogwarts. He couldn't recall being this happy except the time when Sirius offered him a place to stay. Away from the Dursleys. He had a family! He thought he would never have one, especially after he lost Sirius. But all those thoughts vanished when he realized that his brother was raised by Death Eaters and it was Mafloy, the boy who tormented him and made his live miserable.

There are some things that couldn't be forgotten. And Harry's feelings towards Malfoy was not easy. Too much happened.

Author's Note: Short chapter. Usual. I would have made this actually just one chapter and I would have bet it's more than 10,000 words but decided against it. I couldn't imagine Harry moving past all the anger he felt for Draco and would come around to maybe find a brother in Draco. After Draco tormented him, it would be hard. And Harry had lost Sirius and the fact he suspected Draco is a Death Eater. It's a shock to him.

I challenge you guys to make a fanfic about Draco is actually a Potter. I wouldn't mind to see what creative minds like you write. I admit I was upset there wasn't really a "Draco is a Potter and a brother of Harry" fanfic, and that there is so much fanfics of "Harry being raised by the Malfoys and actually a Malfoy". Hmm. Anyway, I hope u enjoyed.

Here are some fanfics that are similar and that I have found: "Thou Shalt Find Kings" by CalamitySnidget, "Changed Fates" by JimBo854, "Blood Is Thicker Than Tears" by atruwriter, "Twins and Brothers" by PhoenixFelicis, "Brothers" by thethirdtroll, "Brothers" by TARDISdoctor (I had just found it now), "Blood Brothers" by Alexannah, "Blood Brothers" by Crazychicke, "The Potter Brother Reunion" by little lizard, "Long Lost" by Lillyflower01, "Pack Brothers" by AlphaBitches. "The Bond of Brothers" by Storm Music.

Now how about a review, eh?