Dejectedly, you call your girlfriend to talk to her, and she notices pretty quickly you're feeling down. She asks worriedly, "Why are you so sad today, babe?"
"Well... I've gotta have the swap in an hour," you admit. "I'm not gonna have a cock again until I finish school."
"You're what?!" she replies. "OK, look, come over here now. If you're not gonna have it again, you should at least use it once!"
You don't even take a second to question her. Hanging up, you race over to her house, getting a hard-on on the way, and she lets you in (her parents are at work today), greeting you in nothing but a robe. As soon as you've shut the door behind you, she casts it off and starts undressing you.
Once you're naked too and you get her to the bed, you freeze. "Fuck," you say. "I don't have any condoms on me!"
"Screw that," your girlfriend smiles. "Just do it raw! You've got like half an hour left till you have to change, so hurry up and fuck me!"
Doing your best to forget that, you push inside her wet pussy raw and start pounding her eagerly. She moans and clings to the sheets, and when you play with her boobs her voice grows even more longing and eager. You're not sure how, but you manage to push your impending change to the back of your mind long enough to focus on how good she feels to fuck, and when she hits her peak and her passage starts clenching round you, you can't hold back and cum hard inside her, kissing her passionately while your hands cling to her boobs.
You don't get to spend any time enjoying the afterglow, as you check your phone and see you've only got about 15 minutes to get to school. Sadly, you say, "See you, babe," and pull out, dressing and leaving her house, while she lies contentedly with your white seed still seeping into her pussy.