First, a wish for discovery!

"So... you mentioned terms to joining the harem?" Asia asked. "Who else is in it? Are Akeno and Koneko also members?"

Issei snorted. "Akeno, not yet. Though she is somewhat involved in our sexy fun, and wants to watch at times... Koneko? Yeah, she might actually be trying to kill me and make it look like a training accident at this point, I don't see that happening literally ever."

"Meh, I wouldn't write her off so quickly, Master. You just need to earn her respect is all," Rias mused. "But regarding the terms of your inclusion, Asia, it's really up to you. Master's a pervert, but he does have respect for consent. He won't cross any lines you're uncomfortable with, and he'll try to focus on any kinks you might have, so long as they con't cross any lines with him."

"Um... kinks? I'm... not exactly sure which ones I might have... I've avoided thinking about sex as much as possible my whole life..." she admitted.

"Hmm, okay... well, how about this? Rias? Could I get her to know her own sexual side better with a wish?" Issei asked.

"You most certainly could, Master," Rias nodded in full agreement. "Easily."

"Yes, let's do that!" Asai nodded, flushing but eager.

"Alright then," Issei smiled. He already knew what Asia would be into once she was in touch with her own desires, but it was better to let Asia herself learn that than him just telling her. And He wouldn't know how to deal with the awkward phase of self discovery for her, so he decided to expedite the process. "Rias, I wish that Asia would gain a sense of what she wanted out of a sexual relationship, to gain a full understanding of her own desires!"

"Wish granted, Master!" Rias grinned, snapping her fingers. Asia gasped and held her head, not in pain, but slightly overwhelmed as the spell took hold.