She's an assertive sub!

"Well... I think I'd like to be a submissive, ribbit," Tsuyu nodded. "I think the specific term I'm looking for is "bratty sub,"" she added.

"A... what?" Izuku blinked, and Momo laughed, finding it hilarious.

"She means that while she would ultimately be submissive, she's the type who would like to push buttons, and provoke her Dom to get them to re-establish dominance," Momo explained. "Kind of like me, at least at the start of our relationship when you were more hesitant, but to a greater extent. Basically, she is the type to go, "make me," while wanting you to do so."

"...huh," Izuku remarked, staring at a grinning Tsuyu. "...so, you want to be under magical compulsion like Ochaco's, but with more leeway to resist, for the sake of playing some games with me?"

"I thought you said it wasn't magic, ribbit?" Tsuyu asked.

"We just call it that for the sake of convenience at this point," Ochaco shrugged. "Less of a mouthful than "overly, ungodly complex physics, and metaphysics that fried even Principal Nezu's brain,"" she added.

"Ah... Then yes, please, ribbit!" Tsuyu nodded.

Izuku nodded and made the wish, Momo snapping her fingers, and making Tsuyu moan, before giving Izuku a look that almost made him take a nervous step back.