Yang Xiao Long ran through the school halls, on her way to Professor Oobleck's class. She ran through the doors and sat down at her seat. The bell rang, and she breathed a sigh of relief.
"Ms. Xiao Long," announced the Professor.
"The bell just rang Professor, I'm on time," said Yang confidently.
"Ms. Xiao Long, That was the bell to end class, I'd like to speak with you when everyone else has left," said the teacher.
The rest of the students filed out of the room, leaving Yang with Oobleck.
"Ms. Xiao Long this is the fourth time this month you've been late, in fact you missed all of class today," said Oobleck.
"I know, and I'm super sorry Mr. Oobleck, it won't happen again, I'll even go learn about whatever it was you taught today right now," said Yang.
Oobleck thought on this for a moment before grabbing a medium sized textbook and handing it to Yang. The title read, "Grimm, Asexual or otherwise?"
"I want that textbook read by next class," said Oobleck.
Yang thanked him for this chance and ran out to the halls. She opened up the book and began reading. As she read, she grew more and more intrigued with the topic, more specifically, of Grimm reproduction on the male side.
"'The Grimm Beowolf, while it is unknown why it possesses one, has an average penis length of 9 inches'," read Yang. "'It is theorized that the knot at the base of penis, which is roughly twice the thickness of the rest of the shaft, is a type of biological sensor that tells the beowolf when the female's egg is fertilized, and it will not stop the mating process until that eventuality is reached'."
Yang continued to read until the entire book had been read. She closed the book, her face red as a tomato. She felt a heat form in her core, as her hand travelled towards her waist.
"What am I doing?! Was I about to masturbate to the idea of a Grimm fucking me?!" She thought.
Her hand shot back to her side, as she stood up, and walked back to her dorm. For the next several days she tried to push out any thoughts in her brain pertaining to sex with a Grimm. As Yang and the rest of her team were clearing out a massive group of Grimm, and coincidentally, they happened to be Beowolves. She blasted a few away, their bodies turning to dust around me. Yang turned to find another one to destroy, when her focus was torn away by the glimpse of a Beowolf's rod. She felt her core heat up from the sight, and was practically fixated on it.
"Yang! Look out!" Shouted Ruby.
Yang was thrown against a tree, and knocked out cold. She awoke several hours later, not in a forest, but in a cave. She held her head, still hurting from the impact. She looked around, the cave was empty, except for when an abnormally large Beowolf prowled in. Yang fixated on the Beowolf, seeing how it's large cock swayed back and forth, she didn't even notice her shorts were already gone, likely torn to shreds. The Beowolf's snout inspected between her legs, sniffing her womanhood intently. Yang stared on as the Grimm took high interest in her sex, her core heating up and her slit growing wetter. She moaned lightly as the wet and hot tongue dragged across her panties. The Grimm slowly lapped at her clothed womanhood, making Yang moan with each lick.
"Gods... this is so humiliating!... but why am I so aroused!?" Yang mentally asked herself.
The Beowolf walked forward, and Yang gasped in shock as she felt the head of its cock poke at her sex. It tried to thrust forward, but her panties kept the Beowolf out. Yang was terrified at the thought of this Grimm driving its cock inside her, and yet she was heavily aroused. She pushed back on the Beowolf, unsure why exactly she was doing this, and tried to shift her panties to the side. As soon as the Beowolf felt the warmth of her bare lips on his cock, it surged inside her. Yang gasped in pain and pleasure as the warm rod hit the entrance to her womb. In no time at all the Beowolf was thrusting his hips against Yang, quickly pounding her opening.
"Why... why am I enjoying this?! This Beowolf is violating me and... and I can't stop moaning!..." thought Yang.
Yang couldn't in fact stay quiet, and her noises encouraged the Beowolf. The Grimm's large penis, 11 inches in length and an inch wide, the knot adding another three inches and twice the width, ravaged her pussy, the sound of wet flesh being slapped echoing through the cave. Yang moaned in pain and pleasure as her cervix was abused by the canine taking her as its own. She felt the cock start pushing harder and harder against her folds, and she knew what it was trying to do. She tried to push the Beowolf off of her, but the Beowolf pinned her arms down with its large paws.
"No, no no please don't!" panicked Yang.
The Beowolf slammed his knot against her folds, and pushed forward, his knot forcing its way into her womanhood and piercing her womb. She screamed in pleasure and pain as a hot flood of semen entered her body. She watched as her stomach further bulged, as the cum couldn't leak out from her because the knot had plugged her up. She felt the cum flowing around inside her, as the Beowolf finished its ejaculation. She felt the Grimm pull its length out of her pussy, leaving her gaping as the cum slowly escaped from her. As she laid on the cave floor trying to catch her breath, the Grimm lifted her hips, thrusting its cock back inside her.
"What the...?! Why?! Why are you?!..." exclaimed Yang.
She thought back to the book she read. "The knot... is a type of biological sensor, that tells the Beowolf when the female's egg is fertilized... it will not stop the mating process until that eventuality is reached." Yang's fear compounded and she felt her heart sank as she realized the ordeal she was truly in. The book said nothing on compatibility between Grimm and Humans, but either eventuality was horrible. She either was going to be constantly fucked by the Beowolf, filling her until she burst, or being impregnated by the Grimm. She lost all focus on these issues as the Grimm forced its knot in her again, and dumping more of its DNA inside her womb. The Grimm didn't even pull out completely this time, proceeding to breed Yang. The blond bimbo's mind was empty as she was filled over and over again, and she soon blacked out to the Grimm crying out as it came inside her again.
...several hours later
Yang awoke from her unconsciousness in the cave where the Beowolf held its member in her entrance. She looked down to her stomach, bulging from the mass of cum held inside her. She watched the Beowolf pull out of her, the cum gushing out of her pussy. She waited for another entrance, but none came. The Beowolf walked away from her and sat in front of the cave opening.
"It's over... it's finally... oh no, that means..." mumbled Yang.
She felt different already. She knew the reason the Grimm had stopped breeding her. It was because she'd been successfully impregnated with a Beowolf pup.