Someday soon, perhaps while you're reading fanfiction, you'll notice how hard it is to find truly original stories out there. If in fact you are looking for a truly original story, take characters from different stories and force them together. Stir, screw up their free will and ta daa! A nice yummy meal of originality!
Or, if you're completely lazy, you could just do something dumb, idiotic, or use a Mary-Stu or Gary-Sue.
I on the other hand shall do niether. I'll use a G'mary-Stew. Watch, as I dazzle you with my mad skills!
Harry stood up and ate his G'mary-Stew. "Thank you, Uncle Petunia, might I have some more?"
"Ungrateful whelp, and here, whelp means nasty child.", replied his Aunt Petunia, who was peeved that Harry insisted on calling her 'uncle'.
"I know what whelp means.", replied Harry crossly. He left the table and began to sing.
"Tomorrow, tomorrow, I'll love ya' tomorrow!"
"Oi, Potter, cut the singing!", sneered his fat cousin. The word 'fat' generally means to be overweight, recent though, fat means something entirely different..
"Fine, oh, Dudley, up for a round of Harry-Hunting?", asked Harry.
"No, it took me a long time to get to my current weight, I'm trying to get in Ripley's, you know that!", replied his cousin, Dudley. The word 'replied', here, means answered.
"Okay then, good luck on your noble mission!", replied Harry. Let it be noted, that although Harry 'replied', he didn't 'answer', which would lead one to assume that he was a demon, but that is simply not the case. He's the devil.
And so, in conclusion, it appears that you just spent what, about a minute reading a bunch of junk. Aren't you proud. Now go read some good stories.