She "jacks" off Denki!

"...at any rate, I want to try something if you don't mind," Denki told Kyoka, looking at her Earphone Jacks. She gazed at him, and Denki turned to Momo. "I wish her Ear Jack thingies would be erogenously sensitive... And also strong enough to endure being pulled on," he added.

"Done, Master!" Momo chimed, snapping her fingers and making Kyoka croon as her additional anatomy tingled, and she waved them about experimentally.

"...I hope you're giving me the ability to turn this off, Master. It might be hard to fight like this," she noted. Denki nodded sheepishly, and made the wish to add that feature to the previous one.

"Now... How about you use them to... Jack me off?" he asked, and the girls groaned comically.

"A for sexy idea, Master, F for the pun," Akemi stated as Kyoka edged closer, and wrapped both of her jacks around his semi erection.

"Agreed," she remarked as she began stroking the coils back and forth over his dick, bringing it slowly back to full mast. She herself was moaning as her ear jacks were stimulated by her actions.

"Unh..." he moaned as his hips jerked. "Okay, fine, bad pun," he admitted, before grinning as Kyoka fondled his balls. "Still, this is nice," he admitted.

"A lot of Quirks have what's called Power Perversion Potential," Momo giggled, watching Kyoka's jacks go back and forth. "This is a fine example..."

"Unh..." Denki moaned as Kyoka sped up. "Yeah, it is... And I bet your Quirk could be used in some fun ways too... Producing sexy clothes, sex toys, all kinds of things..."

"Yep! Though now I have Sex Genie powers for that!" Momo nodded. Akemi also nodded, and looked a little thoughtful.

Kyoka's jacks moved at a feverish pace, until Denki's cock began to pulse. "I'm gonna cum..." he panted. Kyoka only went faster in response, quivering as she approached her own climax. After several more moments, he moaned as he erupted, his seed spattering all over Kyoka's face. She gave a low whimper as she shuddered with a weak, but still pleasant orgasm of her own.

"...mmm... Thank you, Master," Kyoka nodded, smiling as she dropped her ear jacks from his manhood, and licking at his seed.