A bell rings throughout the building as a horde of girls pour in through the wide open double doors. They range in age from as young as twelve to as old as fifteen and have a broad stroke of diversity between the many species among them, though most are carnivores. It's the first day of the school year, and the all-girls school is minutes away from being in session.

A certain mouse enters the building with the crowd. There are a few things that stick out about this mouse purple-furred and spectacled, and the most notable of those few things is that he isn't supposed to be here. He's very much a boy, and his cock is barely contained by his elastic sweatpants. It's three feet long and proportionally thick.

The mouse's name is Adrian. He's fourteen years old and as happy to be in the school as everyone else is unhappy about his presence. It certainly wasn't an accident that he found himself here, either. It took a little string pulling on his part. 

An irregular ring of empty space follows him through the crowd as girls try to keep their distance. Eventually, the mouse arrives at an intersection of corridors where the crowd disperses as everyone goes about their way to their own classes.

He'd arrived bright and early for his first day of classes this year, though he's only just been able to enter as the school's main building opened up for the day. He's certainly enjoyed the campus' accommodations in the mean time, however.

"Did you hear about Brittany?" Adrian overhears a hushed whisper nearby.

"Ugh, what'd she start this time?" comes a not as hushed reply.

"No, I mean, uhm... Did you hear about what happened to her?" the first voice elaborates, "She was found dead this morning on campus. They said her organs were pulped, and-"

"Oh god, enough with the details- Fuck."

Adrian walks out of earshot with a smile on his face. He's had a busy morning already.

The well-endowed mouse approaches his first class of the day: Self-Defense. The class is a popular one offered to aid the student body in protecting themselves from rapists, preds, and other dangers. The world is an unfortunately unsafe place at times, after all.

Adrian walks into the classroom, and the warm chatter and idle pre-class discussion dies down from nearly a roar to barely a whimper. Over a dozen eyes are on him, including the teacher's, who looks up at him over her lesson plan with an unreadable expression.

Ignoring the palpable unease entirely, he takes a seat at a desk near the front of the room.

The teacher's gaze strays towards Adrian regularly as she prepares for the class, though she seems to be making an effort not to stare with how fleeting her glances are. When the bell finally rings and the class begins, she stands from her seat and walks in front of the whiteboard.

"Good morning, class. I am Mrs. Ambleton, and you may address me as such. It's an uncomfortable truth that world isn't an entirely safe or welcoming place, but the lessons you will learn throughout the semester will allow you to navigate it with a greater sense of confidence and security."

The teacher is a white tiger with a tall stature that most find intimidating or comforting depending on the circumstance. Adrian finds it to make her more appetizing, if anything.

Mrs. Ambleton continues to make wary glances towards the intentional misfit in the room as she speaks to the class, "Today I'll be teaching you a basic maneuver to protect against unarmed aggressors. I figure it will make a more interesting introduction than reading some of the theory behind it. If I could receive a volunteer, we'll commence the demonstration immediately."

A dragon girl in her mid teens comes to the front to aid the teacher.

"Thank you, Elizabeth," the teacher says. She approaches Elizabeth from behind and grabs her by the shoulders, "Now here's an easy method to defend against someone who grabs you from behind..."

She gently takes hold of Elizabeth's wrist and guides her into an elbowing motion, "Strike back with your elbow like so. Aim for the abdomen or their side. In a real scenario, you'd use all the force you have, but for today's practice, please refrain. I just want you to practice and become comfortable with the motion."

"Now, Elizabeth, go ahead."

The teacher lets out a small grunt and buckles slightly as Elizabeth gives a light jab with her elbow. "As you can see... Though it was only a light, harmless tap and caused no real pain, it was enough to cause me to lose my grip on her. The abdomen is a very sensitive area, and that's what makes this maneuver so effective."

"Now then," Mrs. Ambleton addresses the class, "I'll be pairing each of you up with a partner to practice with. Please, as I've mentioned, be gentle; no roughhousing around will be tolerated in my class."

The tiger begins to call names and put students together; there's enough open space toward the front of the room for everyone to buddy up without crowding each other. Adrian, meanwhile, has nearly fallen asleep at his desk. He perks to attention when his name is called.

"Adrian," the teacher says, "You'll be with Alyssa." A gruff late-teens shark walks up and stares down at Adrian, who is slowly making his way to the front of the room. His cock is visibly starting to erect in his pants.

"I'm sorry," the teacher whispers to her as she leaves her to her practice partner.

"Uh, teach, is this pipsqueak going to be able to reach my shoulders even?" Alyssa asks.

"Oh you think 'at's real funny dontcha?" the mouse replies, "Cmon now, I ain't jussome shorty here. Howsabout I show ya what I can do?" Adrian approaches behind her. She's right that he can't comfortably reach her shoulders, but his grip is surprisingly firm on her underarms.

"Er-"

"Go on now, defendja self from me," Adrian prompts.

Alyssa gives a gentle jab with her elbow that connects with the side of the mouse's chest. He doesn't even flinch. "I don't think 'at's goinna save ya, mate."

Alyssa gives a slightly harder jab, though not an attempt to hurt him more than a light sting, more out of irritation than anything. Adrian still holds firm.

FWIP

His erection has gotten to the point where it can no longer be contained by his pants, and it pops out, smacking the girl's underside.

"What the-" Alyssa gives a hard jab, but Adrian doesn't seem to even feel it. He relents none.

Adrian pushes her over from behind, forcing her to catch herself on a desk, leaving her bent over. "Hows about a practical demonstration, then? Maybe this'll teachou to defend yourself~"

PLAP PLAP PLAP

The mouse rams his enormous meat hard into Alyssa's pussy, effortlessly tearing through her clothes in the process. The shark screams in pain as the three foot monster forces apart her insides to fit within her. It takes a few thrusts for Adrian to hilt his cock inside of her, not due to any lack of strength on his part but because it takes a few hard pushes with his battering ram schlong to push enough of her insides out of the way for it to fit.

PLAP PLAP PLAP

Adrian climbs onto her, wrapping his legs around her thighs to hold himself in place and continue his violent rape while placing his hands below her arms in just the position they were in before. "C'mon, just use the maneuver, like Mrs. Ambleton taugtcha~ Get me offa you."

Alyssa desperately tries to elbow him off, using her other hand to try to push herself backward into a potentially more favorable position, but neither of the pair budge. Her elbow jabs get weaker and weaker as she loses blood. The red substance is pooling on the floor beneath her where it manages to drip out around the vicious mouse's cock.

The rest of the class has largely stopped their practice by now. Every head in the room is turned toward the copulating pair. A few girls shriek, and one faints. "Someone do something! He's going to kill her!" a voice shouts.

PLAP PLAP PLAP CRUNCH

The sound of Adrian's overwhelming mouse cock ramming into Alyssa's shredded insides becomes interspersed with the sharp crunching of bone. He's evidently reached his victim's chest now, and his cock is cracking her ribs to fit inside.

Two of the bolder girls close to the front run to help Alyssa. They grab onto Adrian's shoulders, trying desperately to wrench him off of her. Even if they had the strength to do so, they're much too late. The shark is moments from death. The only thing keeping her blood pumping is the force of Adrian's cock ramming into her heart like perverted CPR.

PLAP PLAP PLAP SPLRRRRRRT SPLATTER

The mouse doesn't slow down for a moment despite the multiple people trying to hold him back. He slams his cock in for the last time and finishes with a violent orgasm, the tip of his shaft by now just below Alyssa's shoulders. The force of his cumshot is like a shotgun blast, and the shark's head is blown off of her body in several chunks that splatter across the room. Grey matter and skull fragments slough down the walls in a red slurry of viscera.

More girls scream at the sight while Adrian uses the very technique they were being taught on the girls trying to stop him. One is a younger owlet who completely loses her grip on him and falls into the crowd behind them. The other girls stumble and step back to steady themselves, inadvertently clearing the area.

The other girl is a lion cub closer to Adrian's age, who isn't immediately thrown off by the mouse's attack. The mouse throws his weight backward and brings the girl to the ground with him. He begins to make repeated, hard jabs to her gut with his elbow until she begins to vomit blood uncontrollably onto the ground and her grip goes limp.

By now, a couple of the students are tying to drag the owlet away to safety, but Adrian approaches before they can carry her off. She's bawling her eyes out and screams with what little air she can get in her lungs as the mouse steps on one of her talons to halt the girls dragging her away. They drop her on the ground and flee toward the back of the room.

SPLAT

Adrian takes another step forward and stomps down hard on the little owl's face, killing her instantly and leaving her head as little more than a splatter on the ground and a pile of mulched viscera.

Screams and sobs ring out throughout the classroom. A few girls pound on the door, but they can't manage to get it open. Adrian meanwhile takes his pick of his next victims.

He gets his hands on a puma and a dingo, both girls around his age, and shoves them to the ground. He's upon them in an instant, piling the dingo on top of the puma then mounting them both and pinning them to the floor.

SCHLAP PLAP PLAP

He forces his cock inside of the lower girl's pussy, prompting her to yowl in pain as it begins to rip through her. She panics, clawing blindly as she scrabbles desperately to escape, though most of her swipes only land on Adrian's other victim, and he shrugs off any blows that connect.

PLAP PLAP PLAP

The dingo meanwhile can feel the bulge of the enormous shaft inside of the girl beneath her. With each thrust in there's a brief pause then the cock presses a little further when something inside the puma's body gives way. She tries to push Adrian off of her, but he clings tight to the pair, exceeding their strength easily.

PLAP PLAP PLAP

Adrian places his hands on the dingo's throat and grips tightly. Her terrified screams turn to barely audible pleas to release her that can barely escape her throat. "Lesee whichaya doies first~"

PLAP PLAP PLAP SNAP

The mouse puts his lips to his upper victim's, having to crane his neck a little to do so, and forces his tongue into her mouth in a deep, non-consensual kiss. Tears well up in her eyes as she fails to breathe, and slobber spills down the side of her face to the tortured cat below. She can feel the bones breaking inside of the girl beneath her.

As Adrian finally pulls away from the forced kiss, he approaches his second climax of the hour.

"No! No, stop!" the puma is barely able to scream out with her lungs half collapsed by the mouse's shaft.

PLAP PLAP PLAP SPLLRPRLRRT SPLATTER

With a sickening sound of tearing flesh that erupts into a splatter, Adrian pumps a high-power load into his victim. Not reaching up to the shoulders prior to orgasm this time, the force enters the girl's chest, resulting in her upper half exploding into viscera. A limp hand lands on a desk in the corner of the room. Portions of her head coat the windows.

His second victim would scream if she had any air in her lungs. Instead she only makes a weak gargling sound as she loses strength and eventually goes limp.

SNAP

Adrian breaks her neck for good measure and looks down at his fresh kills in sadistic satisfaction. He breathes heavily as he catches his breath, though he's only getting started.

Suddenly, a pair of large hands grip him at the waist in a position not so susceptible to the technique that was taught. Mrs. Ambleton has worked up the courage to put an end to this herself. "Adrian, this violent behavior will not-"

"Oi, Miss Ambleton," the mouse turns and grips her wrist with both hands, then when she goes to remove him takes one hand to grab her other arm, "Been lookin' forward to killin' you withma cock~"

The self-defense teacher tries to get him away with a swift kick to the groin, but he quickly sidesteps it. Adrian headbutts the teacher's chest and releases his grip on her simultaneously, sending her to the floor and winding her. In an instant, he's upon her, dragging two of her students down with him and pinning them beneath his arms by their necks.

SCHPLAP PLAP PLAP

Adrian forces his way inside of the teacher like her students before her. "C'mon, teach. Show yer class howitz done~"

"Adrian- you bastard!" the teacher shouts in a shrill, rough voice. It's not a tone any of her students have heard from her before.

PLAP PLAP PLAP

Where the other two are pinned beneath his arms, a bear and a wolf, his grip presses on their windpipes, slowly choking them. "Go on, save yer kids, be my guest~" the mouse taunts between hard rams into the teacher's body. Her uterus has already been annihilated, and he's steadily working his way through her.

PLAP PLAP PLAP

Mrs. Ambleton is reduced to wordless screams as the pain of her violent rape overwhelms her. The other students struggle in his grasp; he loosens his grip occasionally just enough to keep them from passing out. When the wolf kicks at him, he lifts up his arm to deliver a hard punch directly above the snout before returning to his previous grip.

PLAP PLAP PLAP CRUNCH

Adrian lands a second punch on the bear, not in retaliation for any struggles, just for his own amusement when he's letting up so she can get a breath in. The punch comes with a sickening sound as some portion of the girl's skull fractures, though she isn't visibly disfigured just yet.

"Let go of her!" the teacher wails, unable to stop the smaller aggressor from destroying her and her students.

PLAP PLAP PLAP

"All ya havta do is get me offa you," Adrian teases, "Should be real easy fer someone with your pr'fession~" His cock is ramming into her diaphragm.

Blood leaks from the noses of the captive students. He continues beating them with intermittent punches until their skulls cave in, leaving a gory mess of viscera where their faces belong.

PLAP PLAP PLAP

When the girls stop moving, the mouse tosses their limp corpses to the side. He can feel that he's about to blow, and he decides that of anyone, the self-defense teacher is surely the best victim to send a message with.

Adrian gets up off the floor and hoists up the half-dead Mrs. Ambleton with him. He holds her up by the sides facing towards the horrified crowd while slamming inside of her again and again.

PLAP PLAP PLAP SPLRRRPLRT SPLATTER

In similar fashion to the puma before, the tiger teacher's upper half is violently torn apart by the force of the mouse's orgasm. Her blood and mangled flesh shower the remaining students, who can only shriek in terror and pound uselessly on the door.

The teacher's messily decapitated head lands in the arms of a particularly young hawk, who drops to the floor and breaks down sobbing and wailing.

PLOP

Adrian lets the lower half of the teacher slide off of his shaft and land indignantly on the ground. Cries of "Please, let us go!" and "Have mercy!" come from the crowd.

The mouse only smiles and runs one hand over the top of his cock, licking his lips as he stares at the vulnerable girls before him. "Oi, no need fer worryin'," he says, "Ere's enough of me to goeround~"

The bell rings at the end of the hour, and a click comes from the door of the self-defense classroom. A recent lockdown feature had been implemented to protect students against preds and other threats. Unfortunately for the students of the all-girls school, Adrian has figured out how it works. All it takes is the flash of a counterfeit card beneath a subtle scanner on the door's lock.

The mouse unfurls a curtain over the door's thin window as he closes it behind him, his pants held balled up in one hand. He grabs a passerby to wipe the blood and cum soaking his cock off onto before returning his pants to his hips and heading on cheerfully to his next class.

The room left behind is a gruesome scene. Corpses and dismembered body parts lay slumped over desks or piled up on the ground. A thick layer of blood coats the floor. There are no survivors of Adrian's massacre; the lucky ones are still identifiable without needing to reference dental records.

The only dim light filtering in upon the crimson scene seeps through the curtains covering the windows. It's far from the last room that will be left in such a state today.