A prolonged insertion, and a very brief fuck

Even after all the action it's seen today, your asshole has a very small diameter compared to the width of William's huge cock. As a result, it's not an easy thing for him to get inside of you...

To top it off, he's nowhere near as 'forceful' or physically strong as some of your earlier partners, so even though he's trying quite hard to get his dick into your hole, the progress is very slow.

You do your best to loosen up, but it's hard not to tense when something that big is pushed into you. The end result is a cycle of William getting a sliver more of his cock into you, you panicking and clenching up, and him halting his progress until you manage to loosen again.

After several minutes of quality teamwork between you and your classmate, his cock is buried up to the shaft inside of you. Best of all, the gradual incremental approach means that it barely hurts at all. Despite yourself, you can't help but look forward to the feeling you'll get once he starts moving for real...

You hear a gasp though, and feel the huge cock inside you throb as William reaches his limits and begins cumming. Apparently the several minute entry process primed him a little too much.

You suppress an acute feeling of disappointment. You're glad this will be over with more quickly, right?

After cumming for what seems like a long time, William pulls out, removes an overly full condom, and leaves in a rush.