Time to initiate Ren!

"So, Ren, how would you feel about being a member of my harem? Specifically, among my sex "slaves?"" Ruby asked as Ren straightened up, causing him to blink and stare at her as he processed her blunt question.

"Um... What?" he asked her. Weiss proceeded to face palm.

"Damn it, dunce, do you really have to just come out and say it? There's a little thing called subtlety, have you heard of it?"

Yang slapped Weiss's ass playfully, making her yelp and blush. "Call her Mistress," she chirped, before turning her attention to Ren. "What my sister, slash Mistress means, is that I am a Sex Genie, with magic that grants sexual desires, and she's making a harem that she wants you to be part of~!"

Ren blinked. "...oh," he said, blushing, and not at all questioning it. He was still in a gullible state after all. "So... What does it entail?"

"Well, that is in large part up to you~!" Ruby chimed as Yang embraced Ren from behind, cupping his chest. "Mistress let's you set some terms, so long as they're compatible with ours!"

"Basically, I like being the dominant in sex, though I'm open to equal terms as well," Ruby admitted. "Ultimately though, what I want most is for us both to enjoy ourselves. You'll have some degree of access to Yang's magic, via making requests for wishes, and as long as I don't veto it, you'll have it! Though the wishes need to be sexual in nature."

"I don't write the rules, I just embody them," Yang purred into Ren's ear as he considered.