Warning: this is my oc x Nightmare so please no hate comment

Casper was standing outside,looking at the stars as he sigh.
- i thought you suppose to be sleeping by now ?
He flinch and turn.Nightmare standing there with his passive form,holding two cup of coco and a blanket on his shouder.Casper smile a bit
- i can't sleep,that's all
- well,since you can't sleep
Nightmare said as he sat down and pull Casper in his lap.He threw the blanket over him and Casper as he hug him and chuckles
- you so small
- I'm not
- yes,you are
Casper growl and pout as he look away.Nightmare chuckles and rest his head on him as he close his eyes
- Nightmare ?
- hm ?
- promise you won't leave me alone in this world
- promise
He smile and hug Casper close as he lay down with Casper.They laugh
- years later-
Casper was standing,looking at NM grave with a dull eyes.He smile
- Knock knock
" who there "
A single tears fall down his cheek as he smile again
- Olive !
" olive who ? "
A crimson color fall down on NM grave as Casper lay next to it.He reach his hand out and caress the name on the grave.He smile and close his eyes
- olive you....forever