Her classmates "train" her

"No no no! Guys please!"

The reason that Momo Yaoyorozu was begging so desperately was simple. She was currently dressed in a bikini top and tiny shorts. Her arms and legs were tied in an X shape, laving her pussy exposed.

Meanwhile her classmates, Asui, Ochako, Jirou and Mina were arrayed in front of her, each holding different tools.

"Momo..." Mina looked at her in disappointment. "This is training, we can't go easy on you, or you'll never toughen up."

"Yeah, you need training Momo." But it was clear to the bound girl based off their expressions that this was more bullying and lust than out out of any kindness of their heart.

"Right!" Ochako clapped her hands. "Who wants to go first?"