Disclaimer: J. K. Rowling owns Harry Potter, I only own this plot and my OC Lulu.

Note: I hope you enjoy reading it! I've had this idea a long time now, I just haven't really gotten to it until now. I've always liked Regulus, so this is my version of how his life went the way it did, why he chose to do some things and how he died with my OC thrown into the mix. It will be in Regulus's POV not my OC's.

Will be slight AU.

Pairing: Eventual Regulus Black/OC

Rating: T just to be on the safe side.

Edited: 12/19/15

Chapter 1: Spiraling Down

On that bright -but cold- winter day, everything had started out fine. Fantastic even. Regulus' brother was finally coming home! He had been off at Hogwarts, and it had been an incredibly long time since Regulus had seen him. Regulus couldn't have been more excited, not even if he'd gotten a brand new broom. He missed his older brother. He had missed Sirius a bunch and finally -finally!- he was coming home. Only for a few weeks -but still- he was coming home!

Kreature, his family's house elf, had woken him up early like Regulus had asked him to, not that he'd slept much that night really. Regulus had taken his bath and gotten dressed before heading down to the first floor. The smell of food had Regulus going straight towards the source as soon as it hit his sensitive nose. The sight that had greeted Regulus's eyes, made his mouth water. If his Mother had been there, she would have been extremely displeased with his lack of table manners.

The little house elf had made a wonderful breakfast. It had been spread across the kitchen table, almost covering the whole thing with food. Pancakes, eggs, bacon, sausage, toast, and a few more things he couldn't quite see.

It was absolutely heavenly, the perfect note to the start of the day.

It just proceeded that the rest of the day would be equally as wonderful, there was no doubt in Regulus' mind about that.

That breakfast was the only reason that Regulus stayed quiet and without much movement during those early morning hours.

After the last bite on his plate was gone, he had jumped out of his chair. The excitement of seeing his older brother soon had Regulus walking around the house for a few hours.

Regulus wanted to keep his mind distracted by looking through things, but after he had found the boggart in the drawer, he decided to wait as quietly as he could with a book in the sitting room. Regulus was extremely glad that his parents weren't there, if they had seen the way that he was acting they would have scolded him severely. They might have not taken him along to the station to pick up his brother with them.

That would be a disaster.

"Kreature, is it almost time?" Regulus asked the house elf again for around the hundredth time that morning.

"Almost, Master Regulus. Master and Mistress will be here soon. After that, you should be on the way to pick up your brother." Kreature never liked saying Sirius's name. His brother didn't treat the house elf very nicely. That was one thing that Regulus and Sirius both argued about the most. He really wished that Sirius would see how horrible he had been acting towards the family house elf and make friends. Kreature was around more than their Mother or Father. Even Grandfather and Grandmother were around more. Not that they did anything but complain about something or other. And if Sirius is home…

Regulus had to shudder at that. The last time the screaming match had been one for the books. A World War in the Black Family House.

Regulus nodded to show Kreature that he'd heard, and turned his attention back to his book. Not that he saw any of the words on its pages. He was too fidgety for that.

The minutes went by unusually slowly. To Regulus, it seemed like hours passed before he glanced back at the grandfather clock. In fact it was merely a few seconds or at most a few minutes.

The ten year old let out a frustrated sigh, and he thumped his arm on the couch cushion to let out his displeasure. The book flew to the side, as Regulus couldn't pretend to be reading any longer.

The sound of the door opening, made Regulus jump up from the couch and hurry towards the hallway. Just before he got there, Regulus slowed down his paces so that his parents wouldn't see him running. It wasn't appropriate for a pureblood to run anywhere in the house.

"Regulus, good. I see that you're ready. Orion, it seems that it's time for us to go." Walburga said, looking a little displeased. Sirius had started to show signs of rebellion about two years before and ever since he'd gone to Hogwarts, he hadn't been in her good graces. Before, she could say that he would grow out of it or be brought in line in Slytherin. She had been outraged at the Gryffindor placement. Regulus, on the other hand, had thought it fit Sirius rather well.

Not that he'd ever say that to his Mother's face, or outloud. Ever.

"Yes, dear. Regulus, hold onto me." Orion, his father held out his arm.

Regulus stood next to him and took his father's arm with a firm grip, he really didn't want to be pulled apart. It would hurt, it would hurt a lot.

"Kreature, make sure lunch is ready by the time that we get home." Walburga stated grabbing Orion's other arm.

"Yes Mistress. Lunch will be ready as soon as Master and Mistress get home." Kreature replied bowing his head.

With that, Orion Apparated to platform 9 ¾. Regulus felt like he was being squeezed into a small box for a few moments, then a cold breeze hit him. They stood in the middle of a crowd of bustling wizards and witches. Just then, there was a whistle and Regulus turned to look at the Hogwarts Express that was coming in slowly, then stopped.

Regulus let go of his father's arm and headed towards the doors, wanting to see Sirius as soon as he could. Being small and skinny, Regulus managed to wiggle his way to the doors and he waited there impatiently for his brother to appear. He didn't know if Sirius would walk out from that specific door, but he'd take his chances. Moments passed, and a lot of students walked by him. Just as Regulus thought that Sirius had indeed left out of a different exit, he appeared. And Sirius wasn't alone. Three other kids were with him, and they were all laughing at something that the one with glasses had said.

"Sirius!" Regulus cried happily and jumped at him. "You're finally here!"

Sirius laughed, and hugged Regulus before pushing him away and patting his head fondly. "I've missed you too, little brother. Regs, these are three of my best mates. Remus Lupin, James Potter, and Peter Pettigrew. Guys, this is my little brother, Regulus Black."

Regulus smiled politely at them before turning back to Sirius. "Nice to meet you. Sirius, I'm so happy you're here, it's been so boring without you! Mother and Father are over there."

Sirius nodded and turned to his mates. "I'll see you guys later." Then Sirius followed Regulus back to where their parents were.

"Hello, mother, father, it's good seeing you again." Sirius greeted them sarcastically. Regulus winced at the tone in his older brother's voice. Hopefully their mother wouldn't detect it in this noisy and crowded place.

"Sirius, it's about time you got out of the train. Now, grab onto your father, it's time to go." Walburga said, the displeasure in her eyes obvious to anyone that was looking.

Regulus ducked his head. This wasn't good, she had noticed Sirius's tone.

An idea hit him, and as soon as they appeared at their house, he started asking Sirius a million questions about Hogwarts and anything that had happened so far that year. He had been hopping that the random questions would distract his parent and help Sirius get out of trouble. It had worked brilliantly until the latest question. It had been about who Sirius's fellow Housemates were and what they were like.

That had quickly led to his mother sneering at the names she didn't recognize which got Sirius's blood boiling. Regulus saw the look on Sirius's face, and wished desperately that he hadn't asked that question. Things were spiraling down quickly and Sirius had only been back for a few minutes.

"If you had been Sorted into Slytherin, like you should have, you wouldn't be around all those mudbloods. How despicable! Our ancestors are all cursing you from their graves!" Walburga ridiculed Sirius who looked like his eyes would pop out of his head any second.

"But you're wrong! There's nothing wrong with being muggle born or even a half blood, mother! And I don't care what those snot nosed, inbred, rotting skeletons think!" Sirius screamed at their parents before running up the stairs and slamming the door to his room behind him.

Regulus glanced up, then turned back to his parents, dreading their reaction to his older brother's outburst.

"Go to your room, Regulus." His father stated firmly, his face drawn in a grimace.

Regulus quickly dashed up the stairs, into his room, and closed the door behind him. Tears threatened to fall from his eyes, this was all his fault, he should have never asked that question, never.

This was bad, really bad. Sirius wouldn't be allowed to leave the house for sure. Regulus didn't even want to think about what else his father and mother would do to him. He desperately hoped that they'd think locking Sirius in his room would be enough. Hopefully, that would be enough.

Two Days Later:

"Sirius? Are you okay?" Regulus asked, pushing his brothers door open slowly.

"Go away." Sirius's voice came from the direction on his bed. On closer inspection, it looked like the blankets and covers were pilled up over his head.

Regulus pushed open the door and padded softly toward his brother. "Sirius, I'm sorry. I shouldn't have asked you that."

There was silence for the longest time before Sirius finally spoke. "I told you, to go away."

Sirius's voiced whipped through Regulus like a bolt of lighting.

With a muffled sob, Regulus ran out of the room and down towards the kitchen. No one was at home except for Kreature and Sirius. Regulus hoped that he could get past the house elf, and out to the open air. He felt so bad, Sirius had been punished and it was all his fault! Why did he have to ask that question? Why?

Regulus made it to the kitchen, then he slipped out of the back door, before breaking out in a run. The tears finally escaped from his willpower, and they streamed down his face like a river.

Roughly, Regulus dragged his sleeve across his face, trying desperately to wipe the tears away. That worked for about a moment, before the tears started falling again.

Sirius had been punished, Regulus had heard his cries, and it was his fault. His brother was miserable, and it was all because he had opened his stupid mouth.

Regulus slowed down when he reached a park, slowly he drifted towards a tree and sank to his knees.

He was so stupid! Why hadn't he thought before saying anything? Sirius would hate him. Sirius did hate him, Regulus knew that he did.

The sob escaped his mouth before Regulus could stop it, and more wanted to follow that first one.

Just before Regulus felt like his whole control would break, someone knelt in front of him. Regulus jerked in surprise as the person touched his arm gently.

The words 'Go away' died before they even formed in his mind as he glanced at the person. It was a girl, about his age, right in front of him.

"Are you ok?" Her soft voice was laced with worry.

Regulus stared at her in shock, then the tears began flowing again. He turned his face to the ground, and covered his eyes with his hands. He expected the girl to just leave him alone, what he didn't expect was the hug she gave him. For some reason, that hug made him sob even harder, and she rocked him back and forth gently.

Regulus didn't know how much time had passed, all he knew was that this girl was trying to help. She held him tightly, and was murmuring words like everything was going to be okay. He believed her when she said it, he shouldn't have, but he did.

Finally, after what seemed like an eternity, his tears stopped, and he gently pushed away from her soft embrace.

"I'm sorry, I got your shirt wet." Regulus murmured, rubbing his eyes to dry them.

"Don't worry about it, it's just a shirt, it'll dry off soon." The girl said, smiling gently at him.

Regulus felt his cheeks get red, and he looked down at the ground. She's a muggle, should he be talking to a muggle? If mother found out, she would slaughter him…

"My name is Lulu Sosa." The girl said, her voice sounded hopeful for some reason.

Regulus couldn't help himself, he glanced back up at her and introduced himself. "I'm Regulus Black. Thank you for being here, I… I really needed that."

Lulu smiled and sat with her feet crossed next to him. "I'm glad I could help, even if I was just here and not doing anything."

"You helped." Regulus replied glancing around them. The rest of the park was empty, they were the only ones there.

"Are you feeling better?" Lulu asked, watching him closely.

Regulus glanced away, then back at her. "A little bit."

"That's good." Lulu stated softly.

Regulus nodded, looking at Lulu from the corner of his eye. She was weird, not weird in a bad way, weird in a different way. There was something about her that intrigued Regulus a lot. "I had better go… My parents don't know that I came here."

Lulu tilted her head to one side and nodded. "Yes, you don't want to get into trouble."

Regulus shook his head. "I really don't. I'll see you later, Lulu."

Lulu waved goodbye to him, and Regulus turned in the direction of the house. He was lost in thought, not paying attention to a thing around him. Finally, he got back home. Regulus opened the back door slowly, and snuck into the house, closing the door quietly behind him.

A/N: Thank you for reading! Please leave me a review to tell me what you think. ^-^ I'd really appreciate it!