Lol I don't even know what this is. I've never written a Life With Derek fanfic before and I haven't seen the TV show in years so, bear with me. I wrote this in boredom and hopefully you'll like it? Derek gets pretty out of character. At least from what I remember.

Disclaimer: I don't own Life With Derek or the lyrics to Blow.

I choked out a high-pitched squeal as glitter poured all over me from my locker. I shook my head – which wasn't very helpful – and turned to face Emily, who was obviously trying not to laugh. "Emily! This isn't funny!"

"Nice look, Case," a voice said from behind me. I turned around, only to find myself face to face with none other than Derek Venturi. "It really suits you." I huffed and tried my best to brush the glitter off as I realized he did this – it had to have been him, that smirk of his was just a bit too smug.

"Don't you think this was a tad childish of you, Derek?" I growled. I was still shaking glitter from my hair. "Couldn't you have at least chosen something a little less... stubborn?"

"Oh, sorry, I thought something stubborn would fit your personality better." I heard Emily giggle, but I kept glaring at Derek while mentally cursing her. "Unfortunately, as much as I'd love to take credit for this... I didn't do it."

I gave him my best 'you're-a-filthy-liar' look and planted my hands on my hips. "Don't play with me, Derek. I am not stupid. At least help me get this stuff out of my hair." Emily was long gone now, and all I had to aid me was the small mirror in my locker.

"Why should I help you clean up your own mess?" I glared even harder, if that was possible. How dare he call this my mess? As if to answer my question, he continued, "Hate to break it to you, Klutzilla, but I think someone forgot to close her makeup," he said, pointing at a container that was, sure enough, mine.

I felt blood rush to my face, flushing my cheeks with embarrassment. I hid my face behind my locker door and hoped he would just leave. But, to my surprise, he began raking his fingers through my hair. I was frozen for a moment, but eventually regained the ability to speak. "W-what are you doing?" I was shocked, not only because he was being nice, but because I liked it. And it didn't help that whatever he was doing felt really good – no, Casey. You are done with those feelings. "You don't have to help me.

"I know, but... you'd never get it done in time on your own. And you're my sister, so I'm kind of obligated." Part of me wondered if this was an excuse, and he really just wanted to touch me. A more rational part scolded that thought. A completely irrational part of me decided that instead of accepting his words, I should attack them.

"Funny, you've never seemed to feel that obligation before," I replied, only half joking.

"Okay, I get it, I'm an ass. I don't know what else to say – I'm sorry? I don't hate you, Casey. I actually kind of like you." I wasn't sure how all of this was relevant, but I was pleasantly surprised, to say the least. "That is, when you're not being a control freak, or screaming at me, or throwing glitter all over the place. And speaking of glitter – I think this is pretty much the best we can do.

He dropped his hands from my hair, but I was still focused on the other things he'd said. "Really?" I breathed. I knew he didn't mean he liked me, but a girl can dream, right? By now I was deep in my fantasy world – a world I hadn't let myself visit since we'd first moved in with the Venturis.

"Well... yeah. I mean, I know we fight a lot, but I thought we had, like, a mutual understanding that we don't actually hate each other's guts." Okay, he wasn't exactly the romantic type, but it was sweet. "Don't we? I mean-"

"Yes," I interrupted, "We do."

If only he knew.