Pretty fast.

Ochaco arrived, and was let into Momo's place by the staff at the gate. She quickly headed up to Momo's room. "Hey guys, I'm here!" she announced in her bubbly tone. "What's the plan for today?"

"Hey Ochaco," Izuku smiled, getting up and approaching her. "We haven't made any plans yet, actually."

"Eh? Then why did Momo send me a text telling me to come over fast?" Ochaco asked with a confused blink, having assumed Momo had invited her over with something in mind, and wanted to surprise her with it. "Eeep!" she yelped as Izuku got behind her and cupped her breasts through her shirt from behind, kissing her neck. "Master?" she questioned, before blinking and blushing as she realized what she had just said. The title had slipped out of her mouth so easily, like saying it was the most natural thing in the world. And despite her surprise, she was making no move to stop him, instead, moaning and letting him take these liberties with her body with a thrilled smile.

"Sleep well, last night, Ochaco?" Izuku asked, using her first name as he reached down for the hem of her shirt and started pulling it up.

"Um, yeah, Midor- Mi- Master," Ochaco replied, trying and failing to call him by surname in the formal sense. It was like calling him anything other than Master while he played with her body was unnatural, wrong, and she just couldn't make herself do it. She blushed at the notion, and at the fact he pulled her shirt up over her boobs, covered only in a black lacy bra. Which he also pulled up, before resuming his gentle caress of them. "Ah..." she moaned, relaxing slightly, still confused, but actively loving the situation.

Her eyes then found the bedside table, where Momo's lamp was in plain view, and suddenly, things clicked. Dreaming that Momo was a sex genie, and that she let herself become Izuku's ****, and now, what she was letting Izuku do without protest, and then seeing a lamp like the one Momo mentioned in the dream... "...it wasn't just a dream, was it?" she asked, a smile slowly forming on her lips.

"No, it wasn't," Momo grinned. "Any regrets?"

"None..." Ochaco moaned happily as Izuku lightly pinched and tugged on her hardened nipples.