Extra Credit

Story by Dakgnol on SoFurry

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#2 of Robin

Cuntboy mouse Robin at it again! We all do whatever we can for good grades, especially if we are paying ridiculous amounts of money to do so.


In his fifteen years of educating college kids, Professor Gerald Smith had met his fair share of students. Some were perfect, grade A geniuses who graduated with six-figure jobs secured months beforehand. Others were less successful, yet managed to pull through with hard work and dedication. He even had prospective dropouts who simply rode out the rest of their semesters before returning home to disappointment. As such, it wasn't a surprise that he could easily spot a desperate student willing to do anything to stay in school.

Before him stood a mouse, only around four feet tall and completely dwarfed by the forty-year-old bull's massive frame. Somewhat overweight but still retaining the musculature of his youth through weekly trips to the gym, the near seven-foot bovine scared troublemakers straight and made him difficult to approach. The very fact that this timid rodent stood in his office near quitting time meant he was quite desperate. It was desperate he could work with.

"Um, sir, Professor, can we talk about this grade you gave me?" The boy said, barely able to keep his composure in front of the hulking creature sitting in front of him. Gerald smiled, his eyes already stealthily undressing the twink.

"Is this about the last assignment? My assistant graded that, not me, so why not talk to him?" His voice, albeit gruff, had a pleasant tone that alleviated some of the student's stress. The mouse shook his head.

"He barely speaks any English and his accent is too difficult to understand. I figured it would be better to directly come to you". The bull simply shrugged and leaned back in his plush office chair.

"Alright, hand me the paper." The mouse quickly placed the document on his desk. Gerald quickly scanned the work. "Hmm, Robin. Nice name. Well, I don't need to read this to know what the problem is. You wrote this entirely in cursive. I believe I clearly stated in the syllabus that all handwritten work must be in print." Robin's ears drooped; he was so used to writing in cursive that he absentmindedly neglected that little rule. Gerald flipped through the pages before handing the rodent his papers back.

"Now, if you wrote this like you were supposed to, you probably would have gotten a B+, possibly even an A if my TA felt generous. But a violation of the rules automatically knocks you down a letter grade, two if it makes it too difficult to read."

"I could lose my scholarship over this!" Robin bleated, tears starting to form in his eyes. "Is there any way I can make this up? Resubmission? Extra credit? I'll do anything!" Gerald simply smiled and waved the mouse closer.

"Step around my desk, son." When Robin turned the corner, what he saw shouldn't have surprised him. The bull's belt was unbuckled, his pants were unbuttoned, and his large, thick bovine penis was unclothed. Robin instinctively shied back, nearly stumbling, but it didn't take a rocket scientist to figure out what he wanted. "Hmm? What's wrong, boy? Didn't you say anything?" Robin couldn't think of a response; he needed a better grade and, more so, the taboo situation was ridiculously arousing. Gerald smirked at the indecisive rodent; this wasn't his first rodeo and it definitely wouldn't be the last.

"I'll tell you what: you give me a grade A performance tonight and I'll overwrite your paper's score with it. Sound good to you?" The answer was obvious. As soon as Gerald uttered that statement, Robin was on his knees with the tip of his foot-long length within his maw. His eagerness surprised Gerald, but he was glad he didn't have to coerce the rodent anymore; convincing a boy to have sex with an older gentleman was always difficult. Robin managed to get a third of his dick into his muzzle before it rubbed against the back of his throat. He couldn't handle a throat fucking, something he discovered with a friend with benefits a while back, so taking something thicker and longer down his neck was a no-go.

His hesitation wasn't lost on Gerald. "What wrong? Can't swallow? Well, you are rather small, so I won't mark off points for it, but you'll have to make it up another way. I wonder soft those little paws are." Robin took the cue and began massaging the rest of his meat with both of his bare hands. Using the saliva that was dripping down the length as makeshift lube, he stroked the bull's cock while simultaneously suckling the tip. The combined sensations elicited a soft groan from the bovine and he reclined in his seat as far as it could.

"Damn, boy, you really know your way around a dick. That D is starting to look like a C, maybe a B if you don't mess up the carpet." Before Robin could question what the professor meant, a long groan echoed through the office as a torrent of bovine semen burst from his penis and down the mouse's unprepared throat. Quickly realizing what had transpired, Robin held his breath as he guzzled every last drop of his salty cum, doing his best to keep a perfect seal around his pulsing meat.

The flood was larger than what Robin had ever experienced before and it was a miracle that he managed to gulp it down without spilling any of it on himself or the carpet. With the last few dregs of bovine baby juice in his stomach, Robin spent a few seconds licking and lapping up any residue left over from Gerald's orgasm. The bull patted him on the head with a chuckle. "You really swallowed it all down. Even the missus says my loads are a bit much."

Robin looked up expectantly. "So, does this mean you'll change my grade now?" he asked with a weak smile. The bull shook his head.

"I told you that I expect a grade A performance and so far you've gotten a B. If you want the last few points that'll let you keep your scholarship, you'll take off those pants of yours and show me that little pecker." Robin gave a sheepish grin but didn't bother to say anything. Show, not tell, he told himself as he unbuttoned his tight jeans. Stripping in front of strangers was not unknown to the school slut, but the upcoming surprise was always awkward. With little fanfare, the mouse pulled down his pants and briefs and exposed his groin to the awaiting bull.

Gerald blinked twice, unsure of what he was seeing; sure, Robin had a feminine figure and easily classified as a twink, but for him to have a vagina of all things threw the large gentleman for a loop. "Well, this is a surprise. I've heard of trannies but I never thought I'd see one in person." The mouse blushed, his ears glowing a bright red, and went to pull off his sweater, but Gerald motioned for him to keep it on. "You look cuter that way," he reasoned as he pulled out a bottle of lubricant from his desk drawer.

Robin gave him a quizzical look, which the bull replied with, "I'm not going to screw you in the cooter. I doubt I'd be able to fit half of my dick inside of you. You want to dress and act like a boy? Then you're going to be fucked like one." He poured a fair portion on his hand and started slicking his member with the fluid. When he was satisfied, he had Robin bend over the desk. Gerald stuck two fingers in his anus and pulled him open, causing Robin to wince. He then started pouring a stream of the lube directly into his gaping hole.

Robin shivered and whined as the cool liquid sank deeper into his body. "You'll thank me later when you're not collapsed on my floor crying in pain," the bovine remarked. He placed the bottle back into his desk and gave the twink a few pumps with his fingers for good measure. He withdraw his fingers and pulled the mouse into his lap facing him, his glistening length crooked between his small cheeks. "Get to it, boy," Gerald commanded as he once again reclined in his seat.

Robin dutifully aligned the bovine's meat to his pucker, the tip snug against his anus. With a few deep breaths to prepare himself, he began to push himself down onto the rigid rod. His ass stung as the tip forced him open but the ridiculous amount of lubrication allowed the thick member to easily slide in. Slowly but surely, Robin lowered his lithe frame, barely handling the overwhelmingly filling feeling. He got halfway down the shaft before his body started to refuse more. He backed up an inch to gain leverage and momentum and pushed back down, but he still had difficulty going farther than that point. Gerald noticed his struggling and grabbed his hips.

"Need some help?" he asked with a sneer. Robin nodded, averting his gaze in embarrassment. Gerald chuckled and pulled the boy the rest of the way down. Robin choked, his throat constricting despite the bull's dick being nowhere near the area. Gerald enjoyed the rodent's grimacing face; he always found pleasure in watching boys take his massive meat for the first time. When his penis was finally hilted within the mouse, Robin let out a sigh of relief. His body felt like it was going to burst and his belly was noticeably bulging.

The two sat quietly as the rodent adjusted, the minutes quickly passing by as the patient bovine ran his hands under the twink's shirt and across his body. If he were twenty years younger and not married to a crotchety cow of a woman, he'd definitely entertain the idea of dating the cuntboy. His pussy would be fun to try out but his ass was so snug, he could bust a nut any second. Wanting some action before his impending climax, he nudged the sissy to start riding.

Spurred to action, Robin slowly pulled himself up until a few inches of the bull's erection remained within him, then he quickly pushed himself back down, causing him to yelp but eliciting a deep moan from Gerald. Robin repeated the motion, the second time less painful but just as enjoyable to the professor, and got himself into a steady rhythm. As he recklessly rode the bull like a cowboy at a rodeo, the pain quickly subsided into pleasure. The thick meat in his rectum pushed on his vaginal walls, indirectly stimulating his nerves and giving him the sensation of double penetration.

Robin began moaning like a whore in heat (the time of year not correct for it to be completely true) and his pace quickened, causing the worn office chair to squeak with each motion. Gerald equally enjoyed the boy's bouncing, his groans and sweet nothings music to the twink's ears. Drops of Robin's sweet juices dripped from his cunt, landing on Gerald's pelvis and suffocating the room with his sexual scent. To further add to the pleasure, the mouse started clenching his anus every time he rose, milking the pre out of the bull's dick and causing the stern gentleman to quake.

Unable to hold on anymore, Gerald grabbed Robin mid-pump and rammed him down, the last bit of stimulation throwing him over the edge. The bovine dumped his load into the small boy, filling him to the brim with his virile seed. As he shot his wad, Robin grimaced as he felt himself bloat from the torrent of baby juice. The twitching meat and extra pressure sent him into a climax of his own, his body convulsing at the myriad of sensations flowing through it. The duo soon entered their afterglow, each exhausted from the experience.

"Well, boy," Gerald started, patting the mouse on his back, "you definitely earned yourself an A+." Robin laid against the bull's broad chest and rested his eyes, a smile plastered across his face.