A double boob job! With another fun wish!

Izuku proceeded to pull down his swim trunks as he gave a cursory look around of his own. He sat down, his erection on display as he parted his legs. "Both of you... Use your breasts to get me off," he decided.

"As you wish, Master~!" Ochaco responded gleefully, pulling the straps of her sling bikini inward to rest them in her cleavage as she got down on her knees. Momo meanwhile just pulled her own straps aside and let the whole garment fall, leaving her nude, mirroring Ochaco's motions from there from the other side.

As they sandwiched Izuku's cock between their generous busts, Momo crooned. "To the winner go the spoils~!" she said playfully.

They pressed their boobs together, moaning in delight as they felt his member nestled neatly between them. They began to move, shifting their chests around on his length, going up and down, as well as back and forth, providing him, and each other, a good deal of stimulation. "That's it, Master..." Ochaco cooed as Izuku moaned, his pelvis twitching. "Just enjoy... We're here to please you, after all..."

"And I want you girls to enjoy yourselves as well," he panted, smiling down at them, running his hands along their backs.

"Just giving you pleasure is enough to assure that, Master..." Momo sighed happily as she kept rubbing her tits against Ochaco's, ensuring contact between their nipples. "But we would be lying if we said the stimulation we got wasn't a nice bonus..." she admitted as she leaned down to give his head a lick, sending a pleasant jolt through him.

Ochaco giggled happily, just enjoying the setting, and the act of following her Master's commands as Momo pulled her head back to let her also give his tip a lick. Ochaco immediately took the offered chance, leaning in and running her tongue along it. They took turns at it for about a minute, while never letting up with the tit fuck motions.

"Yes, that's good..." Izuku panted, before having a thought. "...hey Momo... How sensitive are yours and Ochaco's boobs?"

"...pretty sensitive, Master, mine a little more so, why?" Momo asked, curious and eager.

"Yeah, mine are feeling pretty good too," Ochaco nodded.

Izuku smiled, wanting to make this even better for them. "I wish both of your breasts would become as sensitive as your vaginal walls, and your nipples would become as sensitive as your clitorises," he stated through his pleasure. "And that you had the capacity for a localized orgasm in your chests."

Momo grinned at the prospect of enhancing the sensitivity of hers and Ochaco's breasts, and snapped her fingers. "Ah!" Ochaco gasped as she felt her boobs get overtaken by the sensations of rapid tingling, which felt pleasant. She looked down to see her tits and Momo's exuding a faint red glow. As the glow faded, the increased pleasure hit her hard. "Oh! Oh God, that's amazing!" she gasped as she and Momo moved in a more frenzied manner.

Izuku groaned in enjoyment as this increased the stimulation of his cock. He continued to rub their backs, panting as Momo sucked on the head of his penis. Ochaco had her eyes shut tightly, focusing on the enhanced sensations, as well as the task to pleasure their Master. Momo pulled her head off again, letting Ochaco suckle his tip as well as they continued to use their hands and chests to squeeze their boobs together.

His cock began to pulsate, on the verge of release from their efforts. They also felt their breast tissues clench in unfamiliar ways around his shaft, on the verge of their impending, unique orgasms. Izuku gasped out as he climaxed, shooting into Momo's mouth initially, before she pulled off his tip to let the rest of his load hit their faces and breasts.

"Unh!" Momo and Ochaco simultaneously gasped as well, their tits twitching, mostly around their nipples. They quivered as they absorbed the sensations, the experience foreign, but oh so very welcome... There was a joke about certain countries somewhere in that notion.

They waited for Izuku's member to be spent, before they sat up, beaming at him, his seed glistening on them.

(Side note, make of that little foreign but welcome joke whatever you will. I left it intentionally vague so it could be a joke about countries being too welcoming, or a take that comment towards ones that aren't welcoming to immigrants, whichever way you lean. I'm inclined to keep my own political leanings to myself so as not to sour any moods.)