They agree to it after some... fun.

Izuku watched the cabin before Ochaco proceeded to gently grasp his cock. He gasped and looked at her, seeing her sultry expression as she casually changed to Neko form. "So, Master... Nyah, while we're waiting, how about we have some... fun?" she purred.

"Oh, I like where this is going..." Momo grinned, starting to move up, but was stopped by Ochaco raising a hand.

"Sorry Momo, Nyah, but do you mind if I do this one on one with Master this time? I don't mind sharing... but I would like some... special attention today... Nyah," Ochaco mewled.

"...If she doesn't mind, then yes," Izuku told Ochaco, before looking at Momo, who smirked and shrugged.

"Far be it for me to deny my **** sisters some one on one time with Master," she conceded gracefully. "...may I at least watch though?" she asked hopefully.

"I don't mind~!" Ochaco meowed as she pushed Izuku down into a sitting position on the dream grass. He smiled as he parted his legs, providing her full access to his erection. She dropped down to all fours, mewling in relief to be in her preferred position in this form, before crawling over to Izuku. Her ears twitched as she leaned in, licking his manhood slowly from base to tip with her rough tongue.

Izuku sighed as she began to rinse and repeat her actions, and he noticed she seemed to deliberately put more saliva on his length than usual. The reason why became apparent as she lowered her head further to start licking his scrotum, and then, with one hand, gently grasped his manhood, and began to stroke it slowly. She purred as Izuku reached down and pet her head, nuzzling it into his hand as she continued her oral affections and hand job.

Momo sat down, fingering herself with one hand, and playing with one of her sensitive boobs with the other, trying to keep her moans to a minimum. She didn't want to be intrusive to Izuku and Ochaco's one on one time after all. She watched as Ochaco swayed her rear almost unconsciously, letting her tail swish about lazily. Not an invitation to join, but a small gesture to make the show more enjoyable for Momo.

Izuku had just started to scratch Ochaco's ears, and she had sucked one of his testicles into her mouth and was licking it, when the cabin door opened. Izuku looked up, but didn't stop petting Ochaco as Kirishima, now naked from the waist up, and adjusting his pants, stepped out with Mina, both panting slightly. It looked like they had gotten up to some fun in there, while having their discussion.

"...that was fast," Izuku remarked, before quickly shutting his mouth as Kirishima blushed and looked away. "Ah, sorry, I didn't mean to insinuate anything!" Izuku quickly apologized. "I meant it was fast before you came to a decision! ...but if you are a bit embarrassed about how quickly it was over, don't be. I was a quick shot when I started too. You'll get more endurance with experience."

"...thanks," Kirishima replied sheepishly, rubbing the back of his head, feeling a bit better at only lasting a few minutes at Izuku's reassuring words. "Anyway, onto business, I guess?"

"We're listening," Izuku moaned as Ochaco moved her head up, looking at Izuku's cock hungrily, before enveloping it in her mouth.

"I'm in, but I have some terms," Mina told him.