A Fold in Space » A UnderLust-UnderFell Crossover «

Part 19 of 21: Gender Swap

Papyrus held up the petal pink liquid to his eye-socket, scrutinizing it. It would have to suffice.

He had made the potion himself, and although he wasn't as good a chemist as Alphys or Fell, he was pretty sure that he had made the potion correctly. He had followed every single step to the point, and Papyrus was a very meticulous person. He knew he hadn't messed anything up.

He entered his room, where Lust was laying on the bed.

"Hello Kitten." Papyrus smiled at Lust, who only returned the look with an emotionless mask.

"I would like you to drink this." Papyrus held up the vial for Lust to see. A flicker of concern flashed across Lust's face before he composed it. "What if I don't want to?"

Papyrus sighed. "Well, you don't really have a choice." Lust stiffened, looking back at the vial. He was an intelligent monster, and he could tell this was a potion, not just some random drink. If Papyrus brought it closer, he could probably even tell what effects it was supposed to have.

"It might be unsafe." Lust hedged. He really didn't want to take the potion, but he knew Papyrus wasn't taking no for an answer. But if he scared him out of doing it, maybe Lust wouldn't have to drink it.

Papyrus sighed, smiling patiently. "I made it myself. I measured everything exactly, and nothing went wrong. It'll be fine." Lust swallowed. He just couldn't take it.

"No." He reiterated firmly.

Papyrus's eye-sockets narrowed. "Fine. I guess I'll just have to do things the hard way." Suddenly, he was sitting atop of Lust, pinning him to the bed. Lust's eye-sockets widened as he struggled, but it was no use. Papyrus was much too strong.

Papyrus trickled the substance down Lust's throat. Lust gasped, trying to cough it up, but it was already done. He shuddered violently, his vision going white. Once it cleared, he could see Papyrus sitting on the bed next to him.

"What did you do?" Lust croaked, holding his throat.

"That potion changed your gender, but I also added something that would enhance your hormones' reactions." Lust swallowed. He was pretty sure he knew what Papyrus meant, but he didn't want to accept it.
Lust looked down cautiously, pulling up his shirt. He wasn't wearing pants, like usual, so he could expose his bare ecto-genitals. Lust gasped, staring down at himself. It had really changed his reproductive system to that of a female's !

Lust felt like hyperventilating. And that wasn't even the worst of it. If he understood Papyrus correctly, he would now have stronger feelings when he was sexually aroused, and he wasn't even sure if he could control them anymore.

Papyrus kissed Lust on the forehead, smiling at him. He would take awhile to get used to these changes, but it was for the better. He left the room, closing the door softly behind him.