With Ochaco and Tsu

He approached the girls, waving as he did. "Hey, how's it going?"

"It's going well. We just decided to get some exercise in, maybe see if we can come up with some combo moves," Ochaco said.

"That's a good idea!"

"Want to join in?" Tsu asked.

"Sure," Deku said. The three of them started exercising, with Deku following the two girls' leads. They stretched and did some light cardio. After about thirty minutes, they moved on to power testing, experimenting with what they could do when working together.

Over the course of the training session, Deku changed. It was slower at first but began to increase in speed and effect the longer they went. He chose to work out with the girls, and the gold coin he now carried with him had locked onto that and was changing him. His arms body slimmed, still muscular but more lithe and feminine. His chest, hips, and ass expanded to match the notable figures of his friends, and his hair grew a bit until it hung to his, now her, shoulders.

Finally, while they were cooling off, Ochaco gasped as she looked at him. "Deku? What happened?"

"What do you mean?" Deku asked, then she gasped as she heard her voice. "What?" She looked down, just now noticing the lumps of flesh that were pushing out the top of her gym uniform. She unzipped a bit to see that her undershirt had become a sports bra. "How did this happen?"

"Could it be some weird quirk working on you?"

Deku wasn't sure, but she glanced toward Bakugo and Todoroki. Neither seemed to have noticed yet. She had to decide what to do.