Fun, and an "accident."

Ochaco began dancing to the beat, Izuku and Momo quickly following suit, Izuku to the best of his abilities. Ochaco moved in a way that suggested innocent appeal. She danced solely for the enjoyment of moving her body to the music, without thought of any sensuality. Momo mentally giggled at this being Ochaco's idea of cutting loose. She was definitely nice to look at in motion, but she could do so much more to add to her allure. Momo looked forward to teaching her to do that.

Momo for her part, moved with the beat herself, but definitely added a sultry motion of her hips and deliberate bounce of her breasts whenever she could fit it in the routine. It certainly wasn't as sensual as last night's performance for Izuku, but she could still easily be pegged for the seductress she was.

As for Izuku... As he expected, his own movements were pretty damn clumsy. Still, he did his best to keep up, enjoying the recreational exercise. This pattern continued over the course of the hour. And fortunately, Izuku managed to avoid falling on his face at the very least... Well, up until the last song, when he ended up making a misstep. He stumbled, flailing to try to keep his balance as he fell towards Momo and Ochaco.

He might have succeeded in righting himself too, but Momo, thinking fast, and realizing exactly where his momentum would take him, smirked evilly, moving out of his way, but deliberately leaving her leg just enough in his path to trip him up, while making it look like an accident. "Ack!" he yelped as he lost the brief battle with gravity due to this act of sabotage. He ended up falling face first... Right into Ochaco's chest.

"Eek!" she shouted as she went down with him, falling on her butt. They remained frozen where they landed for a solid ten seconds. If one listened closely, there would be the distinct sound of two tea kettles whistling as both gradually turned red at the compromising position.

"AHHHH! I'M SO SORRY!" Izuku yelped as he lurched backwards the moment his brain rebooted and caught up with the situation.

Ochaco, maintaining her furious blush, looked away demurely. "It's fine... It was an accident..." she said. She wasn't mad at all... In fact, she found it... Oddly pleasant to have his head at rest against her breasts. Not that she was going to admit THAT aloud. Still, it had felt nice, and Izuku's klutziness was something she found pretty endearing.

Izuku meanwhile turned a look towards Momo, his eyebrow twitching. She had done that on purpose, he was sure of it! Momo simply had an all too innocent smile. "You both okay?" she asked.

"Yeah, we're fine," Ochaco said. "Good thing Midoriya had a soft landing," she managed to joke.

"Uh, yeah..." was all Izuku could manage to say. They got back up, and exited the room. What Izuku missed, but Momo didn't, was the presence of a faint smile on Ochaco's face. Oh yeah, she was definitely already in, she just didn't realize it yet.