He first asks some questions.

"Um, may I ask a few questions first?" he asked, turning his gaze from Momo, trying not to stare at her cleavage.

"Of course Master~!" Momo chimed. "Ask away! I shall strive to answer to the best of my abilities!" Seeing him glance away, she smiled in a slightly pouting way. While she appreciated his consideration, it wasn't necessary with her. To recapture his attention, she crossed her arms under her breasts, pushing them up and accentuating him.

It worked, and Izuku found himself staring again. "Um, so... Can I wish you free?" he asked.

She blinked, and gave another cute pout. "That's a complicated question to answer, Master." It wasn't lost on her that his first thought was to free her, but it was neither feasible, or even wanted. She certainly appreciated the thought though.

"What do you mean?"

"The lamp I am bound to, it feeds off of... Shall we say, a metaphysical energy produced by granting desires. It lets each person it captures as a genie loose after a while, but only after they fulfill essentially a quota. Basically, it can't go without a genie until that quota is met, then it can simply find another person later. Once I fulfill that quota, I simply need to finish serving my current Master," she explained. "To free me prematurely would require someone to take my place. And I honestly do not want that. Both because I actually find myself liking being a genie, and because I wouldn't want to ask that of anyone."

"Wait, you like being a genie?" Izuku asked.

"Indeed. It just feels so amazing and liberating, ironically enough. I'm basically free of all concerns, and as a genie, I've become incredibly submissive, so I actually think serving a Master is quite appealing."

"How much of that is you talking, and how much is your transformation?" Izuku asked skeptically.

"...about 50/50," she answered honestly after a moment of genuine contemplation. "Granted, I am still miffed that the initial part did happen against my will before I understood what was happening, and I certainly hope I can still live my life alongside my new duties, but that's ultimately up to you."

"...okay, so... How many wishes do I get? Three?" Izuku questioned further, just still trying to process all of this. Whatever information he could gather would help him decide what ultimately to do.

"Nope! You can ask for as many wishes as you like~!" Momo chimed. "Normal genies are limited in the number of wishes they can grant per Master, which is indeed three, but I am unlimited in terms of number, but instead limited by what type of wish I can grant, whereas normal genies can grant any kind with much fewer restrictions."

Izuku scratched his head. "So... What type of wishes are we talking here? Wait," he added before Momo could answer as he blushed, realization hitting him. "...you called yourself a Sex Genie... So the type of wishes you can grant are..."

"Sexual, yes," Momo nodded with a sly smile.

Steam practically poured out of Izuku's ears. "So I couldn't, for example, ask for a lot of money?"

"Yes and no. If you can word the wish in a way that includes sexual context, you can get around the restrictions. So if you wished for enough money to easily afford, say, a prostitute, or a hentai game, it would be doable," Momo teased.

"Yeah, no prostitutes!" Izuku exclaimed in a high pitched tone, making Momo laugh.

"It was just a suggestion, Master."

"Right... Um..." Izuku paused, considering. "...could you alter someone's appearance?"

"Easily, especially if it would make them more appealing to someone else," Momo nodded. Izuku nodded with her, coming to a conclusion on a wish he could make to test if Momo was for real...