Pika: this was requested by enough people, I couldn't tag them all. X3

UF. Sans: why?!

Pika: people get to see what happens whenever chu two are in heat! They'll know my pain for that time!

UF. Papy: YOU ARE TOLD TO GO SOMEWHERE ELSE SISTER!

Pika: When all the other Sans' and Papyrus' are also in heat at the same time?!

Sans: No fighting you three cause we all know Pika will win cause she doesn't hang with any of the other characters.

UF. Sans: fine.

Pika: yay I win!

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"Hey (Y/N).~" Sans called out to you, wrapping his arms around your neck and smiling at you flirtatiously. You looked at him in confusion and pull away.

"Yes Sans?" You asked him.

"Ever had a skeleton inside you?~" He asked back and you shook your head. "Want one? or two if Paps joins?~" He replied and you blushed.

"N-no thanks Sans! I'm going to my room! Night!" You ran off down the hallway and into your's and Flowey's room, shutting and locking the door.

"(Y/N)? What's wrong?" Flowey asked you worriedly.

"Sans is acting weird. I'm going to call Alphy-" You were cut off by your phone going off. Answering it, you spoke. "Hello?"

"(Y/N)! Sans and Papyrus are in heat! Get out of there while you have the chance! Have either of them touched you?!" Alphys' voice rang out through the phone.

"Sans hugged my neck... why?" You answered and she started freaking out.

"I'm too late! They already laid a claim on you! Whatever you do, unless you want them to fuck you, dont let yourself get cornered by them! I'll explain later. Bye!" She quickly hung up and you sighed, might as well go to Grillby's.

"Flowey want to come with me to Grillbys?" You asked, feeling hungry ((for food or skelly reader? 😏 )). He nodded and You grabbed his pot before opening your window and hopping out. The snow cushioned your fall as you stood up and started heading towards Grillby's. Once you walked inside, you noticed that the place seemed less... deadly with Sans not there.

"Hey Grillby." You said as you say in your usual spot and put Flowey down beside you. He looked at you confused.

"Sans and Papyrus aren't keeping you in their house fucking all week? It's their heat cycle." He commented, handing you your usual fries/burger. You shook your head.

"Alphys said something about a heat cycle too. What's that?" You asked him. He chuckled.

"I guess I should tell you, after all, you'll have to deal with it. All monsters go into heat, some longer than others. Our heat is like an animal's, where we have the crave to mate and impregnate or be impregnated. A monster in heat may touch another to mark them as their own, like a claim. Skeletons heat last about a week and they get extremely rough from what I've heard." Grillby explained and you groaned before hitting your head on the counter.

"Fuck! Sans touched me earlier and that's why Alphys freaked about it!" You groaned and he laughed.

"You are screwed, literally!" A monster called out and everyone in the bar erupted in laughter. You only kept your head down. Sometimes you wished you had left and gone to the surface. You were treated like a normal person down here, joked about whenever something doesn't go your way. You were hated about as much as any other random monster, okay a bit more than a random monster since you were human but still, everyone knew not to mess with you cause of who you hung around with. Apparently living with the two strongest monsters in the underground, except maybe the king himself, had it quirks.

"There you are (Y/N).~" Papyrus' voice rang out in the pub and you yelped in alarm as you were suddenly picked up. He also grabbed Flowey, knowing how important the flower was to you, and carried you out. Laughter rang out in the bar again as you were carried away, face red in embarrassment.

He carried you to the house before dropping you on the couch next to Sans, making you squeak a bit. They both chuckled as Papyrus locked the door and you sat up, looking at them both nervously. You were a virgin and between two monsters in heat. This may not end well for you.

"Welcome back (Y/N).~ why'd you leave?" Sans said, leaning against you and grinning seductively. You gulped and leaned away a bit.

"I must agree (Y/N)~ why did you leave to that nasty place?" Papyrus asked, wrapping his arms around your neck and looking at you.

"I w-wanted to go get fries/burger. S-sorry." You replied, slightly nervous. Sans nuzzled your stomach while Papyrus nuzzled your neck. You were getting really uncomfortable like this...

"No leaving the house this week, okay?" Sans told you and you nodded, feeling the punishment would probably be something extremely kinky and maybe painful.

"C-can you let me go?" You asked nervously and they shook their heads as they played a bit with your skin. Sans had sit up to play with your legs, running his hands down them and grinning at you. Papyrus' grip loosened and he was resting his head in the nook of your next, just nuzzling your neck. You quickly took the chance to pull away from them and stand up, blushing brightly.

"I-I'm going to cook dinner. Come on Flowey!" You said quickly before grabbing the flower and hurrying into the kitchen.

That's how most of the week went, you dodging the brothers every chance you got. They literally glued your window close and one would always hear if you so much as unlocked the door, so you were stuck there.

You walked downstairs, intent to go to the kitchen for food, when you were suddenly tackled from behind. Flowey was in your room, not wanting to risk coming out, so you didn't have to worry about him as you threw out your arms to catch yourself.

However, you weren't expecting the red glow to appear around you.

Papyrus chuckled as he brought you and Sans up with his magic and into his room. He dropped the two of you into his bed before shutting and locking the door and window, leaving no escape. Sans was spooning you, his arms wrapped tightly around your waist.

"You've been very naughty (Y/N), denying us all week. We'll have to teach you a lesson." Papyrus said as Sans' hands went under your shirt. You gasped as Papyrus started licking and nibbling your neck.

"G-guys stop. I d-don't w-want this!" You exclaimed, tears forming in your eyes. They both saw this and stopped.

"Did we hurt you (Y/N)?" Sans asked as you pulled away from the both of them, curling into a ball.

"G-guys I don't w-want to do t-this! L-let me go!" You cried. The thought of your friends raping you was real and terrifying.

You were surprised by two pairs of arms wrapping around you, the brothers hugging you tightly. You looked at them, tears in your eyes.

"Sorry (Y/N), we can't help it." Sans admitted, looking at you.

"He is correct (Y/N), the only reason we are so protective of you at this time is because we both love you." Papyrus confessed as they both when red. You stared at them, surprised.

"W-what?" You stuttered out. Sans smiled lightly.

"Yeah we both fell for you (Y/N). We don't want to hurt you either. Please accept us, we'll even be nicer to each other!" Sans said and Papyrus nodded in agreement. You didn't know what to do.

((oh look~ choices! A is chu accept them. B is chu don't feel the same (which leads to the Mettaton thing happening.)))

A-accept them

"O-okay. I'll give us a try." You said quietly. They looked at you in surprise.

"Really?!" They both exclaimed and you nodded, blushing quiet a bit. They hugged you even tighter and cuddled your sides. You giggled and cuddled back.

This was nice...

B-Reject them.

"S-sorry guys. I don't feel the same. Maybe in the future but not now..." You told them, instantly feeling bad. They hugged you a little tighter before pulling away.

"That's okay (Y/N)." Sans said, a hint of sadness in his voice.

"Yeah it just means we need to work to win your love!" Papyrus told you and you nodded.

"Okay. Thanks for understanding you two." You said before leaving the room, going to your bedroom. You laid on the bed and sighed.

Why did they have to like you? Only for you to break their hearts.

_End of Oneshot_

Pika: aww that was cute! Okay guys! Hoped by likes it! Chow for now my lovely Pika Pals! Stay Shocking! Pika!