That's what demons are for.

"Demons works too then...don't they?" Asuka already reaches for her phone and thumbs something in as Keito thinks about that. "Yeah, that would probably work. If it helps so you don't think I'm just acting like a perv, I can't even be the one doing it. Alex has to be the one to do it. It doesn't matter how, but he needs to get his stuff in the body and then make them cum AFTER. It HAS to be done exactly like that."

"What kind of rule is that?" It's more than strange. Especially that if there was something that highly specific required that he couldn't do it himself....it would mean that he would have had to think about this in advance and get both of you to agree to doing it. "Well jeez. Is this something you're really going to complain about?"

"Why is it that whenever something exists, you humans, must find a way to have sex with it?" A flash of light that appears by Asuka asks the question, before a woman covered in feathers appears. "I didn't make the rules to seal." Keito defends seeming to have either forgotten or ignoring what you just asked him.

"I wasn't criticizing." The thing that you know is a Harpy grins. Asuka leans against the wall and crosses her arms. "That's super. So you just gotta fuck on the seal then, right? Let's see if that works." Asuka clearly doesn't feel like bothering if she can't confirm what he says to be true, but her Harpy doesn't seem to share that feeling.

"Well at the very least, we'll all have fun trying. So what hole is first?