Authors Note: Hello All, this is now new and improved. Not much of an overall plot change, just fixed up all the horrendous typos and grammatical errors. And the super exaggerated stuff that makes a story really annoying. Anyways, this story was inspired by 'The Fifth Marauder" by Vera Rose Nightingale, so if you like this story, read hers as well.

Disclaimer: The characters you recognize are not mine, only the plot, and even that I can't be sure about. Just know I did not take anyone's idea on purpose.

Ugh! I hated him, he was such an immature, arrogant prat! He thought he was so much better than me just because he was older, and only by one year! 'Who is this jerk?' you ask? He's my brother. My fifteen-year-old brother. What a brother he was too: hated my twin because he got put in Slytherin, and hated me because I wouldn't let him control my life. He walks around with his stupid friends and acts as if he runs the entire castle. It's so infuriating. Well, maybe I am being unfair, when they aren't acting like prats, his friends are pretty cool, and pretty fun to hang around. It was just so annoying when they got all protective over me. I mean if having two brothers that would kill just because you were talking to a guy is bad enough, try having five! Well, more like four, one of his friends probably didn't care at all.

I've just realized I gave almost an entire rant without telling you who I am, why I'm so upset, or who my brother is. Well I'm Cassiopeia Black, I know you hear that name and think: Black, as in The Sirius Black? That really hot guy that I've had a crush on since first year? Yeah, well it is that Sirius Black, I mean come on, how many people do you know that have the name Sirius Black? Well that's just because our parents are whack jobs, come on now, they have to have some weird obsession with stars; There's Sirius: the brightest star in the sky and the chest of Orion's hunting dog, Regulus: the brightest star in the constellation Leo, and me, Cassiopeia: a constellation. What is wrong with them? But I'm straying off my point. So I am Cassiopeia Black, Cassi for short, my older brother is Sirius Black, and my twin is Regulus Black. Now what exactly did Sirius do to piss me off so much? Lets see shall we?

It was lunchtime but two students weren't in the Great Hall, they were in the library, they were both quite behind on homework and needed to finish. However about half way through the period the girl threw down her quill in frustration. "I can't do it." She stated to the boy working opposite her. "I'm drowning in work that I will never finish. I'm going to drop out of Hogwarts!" She gave an exasperated sigh, and sat back in her chair, her arms now folded across her chest.

"Don't give up Cassi, we'll get through this mountain of homework somehow, but you know what I think?" he asked her, the shadow of a smirk playing across his face.

"What do you think Aaron?" she was smiling slightly now too.

" I think all this homework is stressing us out, we need a break, you know, some time to just have fun and be teenagers." Cassie looked uncertain, and she was about to answer, but seeing the look on her face he started again, cutting her off. "And don't try to deny it, if you had some fun wouldn't this be much easier?"

"Yes" she responded half-grudgingly while rolling her eyes.

"See" he was completely smiling now. "Listen, there's a Hogsmead trip this Saturday, you wanna go?" her mouth almost dropped, but she was able to keep it up. Was he, Aaron Samuels finally asking her on a date? It was too good to be true, it had to be. And it was, for he quickly added "as friends of course."

"Oh" she said, slightly downcast, but picked up her mood, "Yeah, I'd love to go to Hogsmead with you, finally get over this homework 24/7 thing."

Mean while in the Great Hall, a concerned older brother was looking around for his sister, but he didn't see her. When he voiced his concern it was Remus who suggested that maybe she was in the library. "After all, she probably has a lot to catch up on after being in the hospital wing because of that bludger."

"Yeah, you're right Remus, thanks, I think I'll go see if she needs any help." And with that Sirius Black got up and went to the library to look for his sister.

When he entered the library he started towards the back, where he knew she would always sit, as he got closer he could hear her tinkling laughter, and knew she was not alone. But he hoped for the sake of whomever she was with that it was a girl. As he came around the last bookshelf he saw that she was in fact sitting with a boy, he felt his rage boil up inside, but tried to remain calm.

"Just what do you think you're doing?" he asked. At his voice her laughter stopped and she turned around to face him.

"In case you don't remember, I was hit with a bludger during last week's game and got a pile of extra work because of it." She replied as though it was obvious what she was doing, and she did not understand the fury in her brothers' eyes. But she did, she understood he was pissed because she was sitting alone with a guy. But really: What's the big deal?

"Yeah, I do remember that, but why are you with him?" his voice sounded like it had venom in it when he said the last word.

"Because, he has some homework to finish too, it's not a crime to do work in the library." Cassi replied with venom in her voice as well.

"Why were you sitting together?" he asked immediately. Cassi stood, and faced him full on before replying.

"First of all we are friends, second of all why do you care, and third of all, as much as I'm sure you'd love to control who I'm friends with Sirius, you can't, and it is none of your business who I spend my time around. I'm not a baby, I don't need you to stand around and watch everything I do, I can take care of myself thank you very much, now if you would excuse me I have loads of work to do, goodbye." She sent him a death glare and sat back down. However much to her displeasure he did not leave. "That's your cue to leave." She said quite nastily.

"No."

"Yes."

"No,"

"Sirius, I have work to do, go away." She turned back to her paper and he made to walk away, before doubling back and hiding behind the shelf and pulling out his wand.

The two fourth years continued working after Cassi apologized for her brother's behavior, and assured Aaron it wasn't just him her brother hated, but all guys. They were un aware that all of Cassi's belongings, except for her parchment, quill, and ink bottle, were all moving ever so slowly into her bag, when everything else was in Sirius waited for her to dip her quill in her ink well before putting that in her bag too, then he quickly did then same with her paper and quill. He ran out behind her, and while she was completely distracted about where her things had gone, he grabbed her wrist and bag, and pulled her out of the library while she screamed bloody murder. The librarian was not pleased and banished both of them from the library for three weeks. For Sirius it didn't matter, he never went in there anyways unless he was looking for Cassi. She however, loved the library and wasn't pleased about the arrangement, he dragged her all the way back to Gryffindor tower before letting go of her. It was empty, because most of the students were still at lunch, but they would be returning shortly.

She turned around and slapped him "Do you have any idea how much I need the library right now? I'm behind in all of my classes, and now I can't even go and get books because of you!" She went to slap him again, but this time he caught her hand, and shoved it back at her side.

"Well maybe you shouldn't go sneaking around with boys!" He returned.

"Sneaking? Sneaking?" Now she was shouting. "Sirius, we were doing homework in a completely public place, we weren't sneaking!"

"No one was there!" He yelled back at her accusingly.

"That's not my fault, and actually someone was there: the Librarian! And it's not like we were doing anything either so I don't see what the big problem is!"

"Well I do!"

"Care to enlighten me then?" she asked

"You were there together all alone!" he yelled back at her just as that portrait hole opened emitting half of Gryffindor, most who stopped dead upon hearing the screaming. Cassi ignored them and shouted back.

"I already told you nothing happened," Her voice dropped to just above a whisper, "don't you trust me?"

"No!" Sirius immediately replied, still yelling. Then he turned towards the door when he heard James call his name, realizing for the first time they had an audience he turned back to Cassi just in time for her to punch him in the face and storm up to her dormitory. She slammed the door and broke down on her bed crying.

Authors Note: So did you like it? Are they too terrible towards each other? Please let me know, and as always: Read and Review.