Succubus Girlfriend (Dom Futa/F 4 Sub F)

Looking for a submissive female partner to play out this idea with me.

The idea is that MC is a succubus from hell who gets summoned by YC by mistake. Perhaps it was one of those sketchy websites you found that you though was just a scam or joke site, or maybe YC didn't think the old book she found in the back of her favorite bookstore was legit when she read the incantation aloud in her bed. Either way, MC is now sitting naked in your bedroom, expecting YC to offer her a contract for a night of pleasure in exchange for some life energy before she'll be sent back to hell. In YC's panic of not knowing how contracts really work, and fearing MC's here to take your soul when the night's over, YC blurts out that you want MC to become their lover. Not a one night stand, but a full on romantic relationship! Surprisingly, it works! As YC will soon find, the terms of the contract means MC can stay in the human world nearly indefinitely, something every demon dreams about. Now YC has a Succubus girlfriend, whose more than a little grateful for such a wonderful contract and is going to make sure YC never wants to send her back!

Succubus powers:

• Sex diet; As a succubus, she lives off the life force generated during sex. While she can eat human food and even enjoy it, it doesn't sustain her the same way eating out a girl does.
• Futa mode; For those who want their new girlfriend to have bit more between her legs.
• Aphrodisiac; To ensure her partners can always be in the mood when she gets hungry, she can give off pheromones that have aphrodisiac like effects, she can also apply these effects to her saliva and other bodily fluids.
• "Normal to everyone else"; To everyone else, she looks like a completely normal, albeit very attractive, women. They don't notice her red skin, demonic eyes, horns, and tail. Even her sexual acts don't seem to draw any attention if she's seen or heard. She can even extend this power to YC.

What I'm looking for:

• Ages: in terms of YC's age, anything between 15 to early 20's is fine.
• Playful romance: Sticking to her contract, MC will be romantic with YC, but of course her demonic nature will lead her to be very naughty and playful at the same time. Teasing and trying to seduce YC every chance she gets.
• Hard or Soft: Depending on the mood and YC's personal preference, MC can be either a sweet and loving soft dom who'll pamper and spoil you rotten, or a hardcore BDSM dominatrix who'll tie you down and "use" you like the little slut you are. Or maybe somewhere in-between.
• Not evil, just perverted: MC doesn't have any grand plans to reap the souls of the mortal world and isn't looking to corrupt YC to try and turn them evil. She just wants to fuck... a lot...
• Shameless: MC lacks the concept of shame. She'll walk around naked, she'll openly brag about how the two of you have fucked to YC's friends, and will even fuck YC right in front of them. Thankfully her powers let her get away with it without anyone batting an eye. Hopefully YC can keep up.
• Beyond the bedroom: YC has a life outside of having sex in the bedroom 24/7. She probably has friends, family, school, even maybe a job that she has to get back to. Of course, now she'll have a sex crazed girlfriend with her that'll make things more "fun".

Succubus options: Here's a few reference pics for what MC can look like.