Next day, visit Yumi again.

"So, we're set for the study group for tomorrow?" Izuku was asking Momo as they headed for a locker room again, Yumi set to meet them there. Unfortunately, Ochaco wasn't currently with them, having her session with Hound Dog today.

"Yes, though Iida is petitioning to kick out Mei. Kirishima seems pretty supportive of the idea," Momo remarked, pouting. Mei was too hot to let go of so easily. Izuku still wanted a few weeks of regular interaction with her to determine if she was a good fit to extend the offer to.

"Guess we just have to keep her in line then," Izuku sighed. "...maybe we can use your Quirk to bribe her with more high end materials to make her... Babies with?" Izuku suggested.

"...not a bad idea," Momo chuckled. "Then maybe you can make some actual babies with her if she joins the harem," she whispered in his ear.

"Momo!" he protested, red in the faceas they entered the locker room where Yumi was waiting.

"Hello, Master," Yumi said, sitting on one of the benches, her expression mostly stoic still. It would take time for her to learn how to express herself.

"Hey Yumi. Have things been going okay?" Izuku asked, shaking off his embarrassment as Momo giggled at him.

"Things were fine, just kept guard near the entrance, though I did have an unusual encounter earlier," Yumi remarked.

"An unusual encounter?" Izuku blinked.

"Yes. I believe one of the students was pretending to be a faculty member, had a poorly faked badge, at least, I assume that was what it was," Yumi answered.

"Wait, what!?" Izuku asked, paling at the thought of some student trying to do something bad with her. "They didn't try to order to harm anyone, or anything, did they?"

"No Master. He was simply trying to order me to show him my breasts," Yumi replied.

"Who- wait, no, don't tell me..." Izuku assumed a flat look, alongside Momo. "...short, with purple hair in the shape of balls?"

"That does match his description, yes," Yumi nodded.

"...note to self, kill Mineta later," Izuku grumbled, and Momo sighed at hearing Mineta trying shit, then giggled at Izuku's reaction. "You didn't do it, did you?"

"While I have no issue with showing off my breasts, I realize it would be a bad precedent to let students think they could fool me into thinking they're staff and thus have authority over me," Yumi shook her head.

"Good, the creep doesn't deserve a show," Momo smirked. "Now then, Master, how to play with her today?"