I'm looking for a fairly sick and depraved one shot involving two classic anime-tentacle demon fighting-ninja-magical girl-twin girls that usually end up in the ponderous position of getting ravished by the demons more than destroying them. Of course there will be enormous tentacles spraying tons of...whatever tentacle demons ejaculate, but the thing I'd like to try is full penetration of the girls, such as a tentacle going into a girls mouth, out of one of her lower holes, and into the sisters mouth, or vise versa, or any combination of those. Of course, despite the physics and anatomical impossibilities of it all, we're lucky that anime girls are insanely durable and are capable of this sort of thing without any major internal damage. Just ask Magical Girl Ai. They also have impeccable internal hygiene.
Anyway, I'm up for being the girls or the monster/monsters. Send me a PM if you're interested.