Decipher Me (Billdip)

"Y-You.." Dipper took large intake of breaths and swallowed down the lump in his throat, the fear wouldn't stop crawling up in his spine the moment he laid his brown doe eyes at the grinning demon itself "-You swear you wouldn't do anything to harm my family? E-Especially my sister Mabel after I do this?"

The creature grinned

"When a Demon like myself makes a deal or a promise pinetree, he's bound to it for all eternity." He said with a motion on crossing his heart- if he even has a heart, like what human children would do to make a promise so they could never back out of their word.

Dipper's legs were trembling at this point as he slowly stood up from the ground, with the demon's hand outstretched and eager for the brunette to shake on it, those clawed like hands were almost impossible with the black leather gloves he was wearing, silently thinking the gloves was something to stop the sharp claws from digging in anyone's flesh. Dipper's flesh for example.

He took one last shaky breath and looked at the outstretched arm from the shadow, golden yellow eyes peered in the dark watching every move the brunette made till the demon perked in delight feeling his small delicate hand shake the demon's claw.

"Then.. its a deal."

As Dipper Pines and his twin sister Mabel Pines visit their childhood town, Gravity Falls, they planned to helped out their uncles Mystery Shack for the whole summer. While Mabel had plans with her friends to party and socialize, Dipper was getting a visit from a very old friend.

***

WARNING

This is filled with so much NSFW, Blood, and just... heavy hard sex.

(This is an Alternative Universe in my version but still the same characters in Gravity Falls, although there are some few changes that I made such as their age and many other more.)