Pain becomes pleasure, but not too much

Jess messes with her phone a bit more, then you hear the ringing. You look down at yourself, but nothing seems different. What did she change?

Jess leans over a bit and smiles menacingly. Then she slaps you.

She's slapped you many times before, but this hurts worse than usual. She might have made herself stronger when she enhanced her body. However, despite being in more pain than other times she's slapped you, you are so overwhelmed by another emotion that you can't completely process the pain. It feels good! It's like there is an explosion in your balls at the same time there is a burning sensation on your cheek! You inhale sharply and your eyes cross at the intense sexual pleasure that you feel along with the pain.

Jess laughs. "Oh, this just got really fun, twerp!" She twists your nipple.

Pain and pleasure roar through your body. "Fuck!" you yell. "I'm going to cum!"

Jess lets go of your nipple and straightens up. "No you're not. Not unless I tell you to. I don't like my property making messes, so I made you leak proof."

Your vision clears and you see that your cock, which is painfully hard, is dry as can be. It seems like it should be oozing pre-cum and getting ready to pop, but as horny as you are, that's not happening.

The bell rings, and Jess looks annoyed. "Well, I guess we'd better head to class. Come on, dipshit, pull up your pants and let's get to history class."

You get up. "But, I don't have history- oof!"

She punches you in the gut, and the pain is bad, but the rush of pure sexual need going through your body sends you back down to your knees. She walks out of the empty classroom and you struggle to get to your knees and follow her. When she gets to her locker, she hands you her books to carry. Despite your situation, you can't help staring at her **** hotness. Just her big breasts pushing out her t-shirt are enough to drive your crazy, but everything about her is so flawless, so far beyond perfection, that it's hard to think straight as you look at the blonde beauty.

She closes her locker, and you follow her to her history class. Jess opens the door and enters to see that the class has already started.

"Well, I'm glad you could join us," says the teacher.