Izuku explains the rules

Ochaco sat on her bed and hugged her pillow, looking up at him. "Okay, explain these rules. What exactly am I getting into having you as my...sex genie?"

"Hm...Hold on. There's stuff in my notes about explaining these sorts of things." Izuku snapped his fingers and a notebook appeared in his hands, glowing much like his ethereal skin. "Hm...okay, so one option for explaining the rules is putting on a big musical number. I've never been very good at singing."

Ochaco giggled. "You don't have to sing if you feel uncomfortable with it."

"Thank you, Mistress." He flipped through another page. "Why don't you just ask me what you want to know and I'll answer that way?"

"Okay. First question: you say your wishes are sexual," she blushed a little thinking about that. "What does that mean? Like, I can't wish for an ice cream cone, but I can wish for a dick-shaped popsicle?"

"Actually, that's pretty close to how it works," the genie nodded. "Wishes can be divided into four categories - Fantasy, Acquisition, Repair, and Charity. These don't mean anything to you, Mistress - they're just how my magic categorizes your desires. Repair wishes are pretty self-explanatory - say you get a little too rough with your fun with either myself or someone you want to use your new cock on. Simple wish cleans up the mess."

Ochaco blushed at that. She never thought of having sex so **** that she would actually break something. The idea was...kind of hot.

"What's a fantasy wish?"

"About 99% of the wishes you'd likely make, Mistress," Izuku explained. "Wishing to not have to wear clothes anymore, wishing to make a girl's breasts bigger, wishing to feel the sensation of the vulva of one of the girls you masturbated to around your cock - "

"Okay! Okay!" Ochaco covered her mouth. "...Can you make it so my parents don't disturb us? I know they're pretty knocked out, but just in case?"

"You'd have to make a wish, and word it so there's a little bit of sexual connotation to it," he replied. "Say...wishing no one could interrupt us while you and I were in private, but there'd have to be a sexual element too."

Ochaco thought about that and took a deep breath before taking her shirt off. "Okay. It's not like you haven't seen it all anyway, and I'm seeing plenty of you. How many wishes do I get?"

"Unlimited, Mistress. I'm your genie for life, or until you no longer want me. They just have to follow the rules."

She shimmied out of her pajama bottoms and sat again. "Okay. I wish that no one will enter a room where I am naked with you or anyone else I'm getting...i-intimate with."

Izuku smiled. "Planning ahead, I see. Smart, Mistress."

He snapped his fingers. A blue dome shimmered around Ochaco's bedroom before it faded away again.

"That's pretty cool," the brunette admitted. She smiled at Izuku, already feeling a little more friendly with him. The genie in response looked away a little bashfully as his cheeks tinted darker blue again. "Okay, so I'm assuming a charity wish is, like, wishing on behalf of someone else, right?"

Izuku nodded. "Correct, Mistress. They're the hardest wishes for me to grant since I'm primarily about your pleasure, but managing to benefit others in a sexy way can be very rewarding if you figure it out."

"And acquisition is getting stuff, then."

Another nod. "Yep. This one runs into a lot of barriers regarding mortal economies and the requirement of it being sexual in nature. If you wished for money by, I don't know..."

"Squirting out a million yen next time I play with myself?" Ochaco suggested with a blushing giggle.

He snapped his fingers and pointed to her with an enthusiastic nod. "Now you're getting it! But yes, if I did that all that money would have to come from somewhere. I'd either have to steal it, or - if I just created it - it would be essentially counterfeit as none of the serial numbers would match notes in the database."

Ochaco sighed and nodded. She kind of expected something like that.

"Though I can use it to get you stuff. For example, your dad suggested going to the beach tomorrow. You could wish up a new swimsuit," he suggested.

"But won't they wonder where I got it?" she asked.

"Not if you wish them not to."

"Oh." Ochaco's eyes widened as the full implications of that sunk in. "Wait, so you can just change what people notice? What they think? How they feel about others?"

"Sure. Love, lust, willing enslavement, oblivious to your existence, fawning all over you - as long as it turns you on, I can do it," Izuku replied.