"Come to us, dweller of darkness. We summon you in the names of the old lords..."
Occultic chants echo in your ears as you're held hostage in a dark room, bound by your arms and legs, laying on the ground on top of a strange glyph painted with blood. The only light comes from several black candles lit around you, and you can only watch as these ominous hooded figures continue their dark chanting. How did you even got here in the first place? The last thing you remember is that you were strolling through the park at night, then someone hit you in the back of the head and everything went black. Next thing you know is that you've been kidnapped by some kind of crazy cult who want to use you as human sacrifice for their satanic bullshit. Yeah, yeah, just another average tuesday, the important question here is, why do they need a human sacrifice? What are they trying to do here?
Soon the answer to your questions arrives when the sinister chant reaches its climax. Next to your feet the ground starts feeling hot, very hot, then it cracks open with a sudden eruption of fire coming from deep beneath the earth, filling the whole room with a, orange light and almost burning your shoes in the process. If that couldn't get any weirder, soon a hand reaches out from deep inside the crack, then a second one, and then a head with horns...
The figure climbs completely out of the fiery crack and you can see her better. It's a girl, she can't be older than 12 or 13 years old, but she has horns and a long tail and the fire doesn't seem to bother her in the slightest. The demon girl stands up with her hands on her hips, scanning the room with big, curious eyes as the cultists stare in awe. A woman who seems to be their leader is the first to reach out to her.
"Welcome, dark one, we have summoned from beyond the void to end this worthless realm, please accept this virgin as our offe-"
The cultist leader's villainous monologue is cut short as the demon girl grabs her hands together, looking up at her with a smile, obviously not interested in whatever she has to say.
"Oh, thanks! It's been a long time since I've had fresh human!"
With one swift motion the demon girl shoves the cult leader's hands inside her mouth, then the rest of her arms, her head, her torso... She tries to squirm away but it's useless, in just 5 seconds the woman disappears completely down the demon girl's throat without causing her to swell up in the slightest, she licks her fingers without a care in the world and then notices the rest of the cultists, who're desperately trying to open the door to escape. The demoness skips towards them and yanks one by his robe, then proceeds to shove him in her mouth and swallow him whole too, then she does the same with a third cultist, and a fourth, a fifth...
After a few minutes full of screams and nasty gulping sounds there's no more cultists to be found, just a demoness happily rubbing her still flat belly as she lets out a deep belch, sending a single slimy shoe flying out of her mouth and landing on the floor with a splat. Meanwhile you're trying to crawl away from this madness, struggling with your bindings when she notices you. She gets closer and stares at your trapped for a moment before speaking up.
"Hey, wanna be friends?"
All that happened two weeks ago. The demoness's name is Esprit, she said she's a gluttony demon so that explains her... peculiar cravings. Apparently demons are not allowed to be on Earth without a good reason so she decided to stay by your side as your familiar, that way she can stay for a long time and eat whatever she wants, think of it as a vacation where you get a free cutie little devil to spice up your life. Now you're in the living room of your one-room apartment, sitting on the couch and trying to watch the news while Esprit sits right next to you, casually leaning against you while playing Doom Eternal in your Switch (which she tried to eat yesterday). She pauses the game and looks up at you with those bright, weirdly innocent eyes of hers.
"Hey, human!"