Final Fantasy Hacktics

'cause I'm not a native english speaker, I've surely done a lot of shitty mistakes re-writing it :-)
Can you help me? (Beware: This little story may scare you...read it with some nice music in your hears and lights on if you are easily scared)

QuoteA beautiful young girl is left home alone with only her dog to protect her, because her parents wanted to see an opera.
They tell her to don't worry, as the house is safe and fully locked (Even if a bit isolated).
Also, if for whatever reason she is scared, she can put a hand under her bed: Her dog usually sleeps down there (In fact he is already doing), and it will lick her hand if he sees it.
After kissing the little girl, the parents leave the house.
After being asleep for a short time, she awoke to a dripping noise coming from the bathroom.
She was a bit scared, but after thinking a bit she lowered her hand down to gain a little comfort from her dog.
She felt the warmth of his soft tongue as he licked her hand, showing her that he was fine and that everything would be alright. Feeling assured she drifted off to sleep once more.
Waking once again to the sounds of the dripping tap in the bathroom, she instinctively dropped her hand down to pet her dog.
Once again her dog offered up the loyal companionship that only a much trusted and loved pet can, and licked her hand and she once again fell asleep.
But, after some time, the sound awakens her again.
That annoying noise was still going... Now, feeling a mix of curiosity and fear about the dripping sound, she gets up and slowly walks towards the bathroom, the dripping sound getting louder as she approaches.
She reaches the bathroom and turns on the light.
She is greeted by a horrific sight; hanging from the shower nozzle is her dog with its throat slit open and its blood dripping into the bathtub...
Then, something on the bathroom mirror catches her eye; she turns around. Written on the wall in her dog's blood are the words
"Not only dogs can lick..."

Why would you write something like that?  

also:
This is your text, which I don't think is very becoming grammar. This is mine. This is just a suggestion. Other things between [brackets] are other notes.

QuoteA beautiful young girl is left home alone with only her dog to protect her, because her parents wanted to see an opera.
They tell her to don't not to worry, as the house is safe and fully locked (Eeven if it is a bit isolated).
Also, if, for whatever reason, she is scared, she can put a [her sounds better than a] hand under her bed:. Her dog usually sleeps down there (Iin fact, he is already doing that/sleeping), and it will lick her hand if he sees it.
After kissing the little girl, the parents leave the house.
[Up till here, you have been writing in he present tense, with one exception (wanted), and from here you continue in the past tense. This makes no sense, since what comes now happens later than what came before. Because telling a story is usually done in the present tense, I will continue that.]
After being asleep for a short time, she awokeawakes to a dripping noise coming from the bathroom.
She wasis a bit scared, but after thinking a bit she loweredlowers her hand down to gain a little comfort from her dog.
She feltfeels the warmth of his soft tongue as he lickedlicks her hand, showing her that he was fine and that everything would beis alright. ["Would be alright" suggests things aren't alright now. Since that is not what you mean, using "is" is better] Feeling assured she drifteddrifts off to sleep once more.
Waking once again to the sounds of the dripping tap in the bathroom, she instinctively droppeddrops her hand down to pet her dog.
Once again her dog offered upoffers the loyal companionship that only a much trusted and loved pet can, and lickedlicks her hand and she once again fellfalls asleep.
But, after some time, the sound awakens her again.
That annoying noise wasis still going... Now, feeling a mix of curiosity and fear about the dripping sound, she gets up and slowly walks towards the bathroom, the dripping sound getting louder as she approaches.
She reaches the bathroom and turns on the light.
She is greeted by a horrific sight; hanging from the shower nozzle is her dog with its throat slit open and its blood dripping into the bathtub...
Then, something on the bathroom mirror catches her eye; and she turns around. Written on the wall in her dog's blood are the words
"Not only dogs can lick..."

Seems like I own you a favour
Can I help you in any way?

P.s: I'm doing this for a YT video :-)

Nah, that's okay.

Take it easy on the parentheses.  Parentheses are more formal, you're better off with a hyphen or a semicolon in this context - a short story.