He walks in on a dancing lesson about to start.

When he got home, he paused, listening to some music coming from his room from upstairs. It sounded Arabic, like the kind you heard from sensual dances. Noticing a note from his mother saying she was going to help with house sitting for a friend for a few hours, he smiled, knowing whatever Momo and Ochaco were doing, they had waited for an opportunity like this. Deciding to find out what his girlfriends were up to, he headed upstairs, and opened his door.

"Hi Master~!" Momo grinned, currently in her harem outfit. Ochaco smiled as well, standing next to her in one of her own, matching Momo's but pink. They had both also added transparent veils and detached sleeves with some jewelry to the ensemble, such as gold wristbands, anklets, and collars.

"What's this then?" Izuku asked, closing the door behind him, and an obvious smile on his face.

"Well, Master, you know I like dancing as a hobby, right?" Ochaco asked. "Momo had the idea of teaching me how to do a more... Seductive brand of it... She said you enjoyed it when she did such dances for you." She smiled exuberantly at the thought. "Obviously, I jumped on the idea. And she was kind enough to provide me with the outfit!"

"Where did you girls get it? I wasn't around to make a wish for it, and last I checked, I still had the lamp," he questioned.

"My Quirk, silly~!" Momo tittered.

"...right, ask a stupid question," Izuku smiled ruefully.

"At any rate, Master, we were just about to start my lessons on erotic dancing!" Ochaco chimed. "Would you like to watch?"

"Oh, maybe you could record it for us so Ochaco can review it when she practices too! Not to mention give you the chance to rewatch it!" Momo added, and Ochaco shivered in delight at the prospect of being on camera in Izuku's phone for posterity, her actions always available for her Master's use.

"I like that idea!" she nodded.