Archive of Our Own ^beta

Chapter Text

Character names! Just so you don’t get confused!

Undertale !

Sans

Papyrus

Underfell !

Crimson

Edge

Underswap !

Blue

Stretch

Swapfell red !

Black

Mutt or Rus

Swapfell !

Vi

Cash

Fellswap !

Wine

Coffee

Horrortale

Bear

Cinnamon

Underlust !

Plum

Charm

Underpie

Pinkie

Maud

These are the main 16 in the house! Others will be added later on.

Chapter Text

The light inside your room flows onto your sleeping frame like a waterfall. The heat makes you almost wanna go back to sleep.

“Ugh too much light” You yawn and rise up from your comfortable cover, whining a bit

Time to go look for more houses. Once I find one I’m immediately moving out .

I grab my phone from my desk and turn it on, I flinched slightly when the light hit my eye.

Welp, back to the daily grind!

No,

No,

No,

Ugh why is there nothing on here? It’s like people just want to show off their houses.

Wait! I’ve found one.

[ do you need a room to rent? Well good because we are renting one.

We just have 3 simple rules that will be explained when we are dm about the room.

We share that 16 monsters will be staying in the home with you, 14 males and 2 females.

Your cost will be told and can be shorted or higher depending on the situation.

Text xxx-xxx-xxxx and we can set up a call with you a soon as we can! ]

Is this coincidence or am I just lucky? 16 people will live there? And they want more to stay?

Whatever, as long as I have a roof over my head I’m ok.

I put the number on my phone and text them.

[ new home offer]
Me: Hey, I was wondering if you still had that room available? I would like to rent it.

And like clockwork, a response was sent back to me.

Them: hi, I’m plum! Yes we do still have it up! Do you have time for the rules?

Me: yes! I have time.

Them: ok ,rule number one: Please be respectful! Some of our roommates are either mean and/or can be triggered by something. You don’t have to be the nicest but please do speak with caution.

Don’t be an ass? Gonna be hard to do. I smile and text them back.

Me: Yes of course! I’ve had people like this in my life, I’ll be able to handle it.

Them: On to rule two, Don’t not be alone with Dust,
he has IED, and can have a outburst anytime. If you find yourself in the middle of it, back away slowly and come get me or another roommate.

Me : ok, I can do that !

Them: Thank you for understanding, we’ve had to tell people that he gets triggered by strangers but they’ve chosen to ignore it.

Them: this really isn’t a rule but a choice, I hope you know some monster biology. More so monster heat and ruts. We have a schedule of all our … days if you know what i mean. Ok next research, monster heats and ruts. Sounds like I’m gonna have to delete my history after this. Me: sure I know a bit but I’d probably have to research more tho, is there anything else I should research? Them: nope! This is really all the rules, any others will be added later, we just have to see if you can follow these 3. We said our goodbyes and I closed my phone. Who can’t follow three simple rules? It seems like they’ve rented before but people were having trouble following these rules. I mean they aren’t hard to follow. But hey another man’s trash is another treasure or whatever. I lazily get out of my bed and slowly walk towards the door, I make my way down the stairs and smell the best food ever! My mother is making waffles! My favorite dish, doesn’t matter what day or hour I’ll still eat them. “There’s my sweet girl! Come and eat baby!” My mother happily cheers, she picks up a plate and puts two waffles on it. “Thanks mama” I yawn and take the plate from her, picking up a random fork to it with. I grab a piece with my fork and eat it. I moaned in delight, my mother could bake like an angel!

“So baby sis, got any news on the new house?” My brother James, asked pouring chocolate milk into a glass up.

“Jamie! I don’t want her talking about that in the morning!” My mother had a said look on her face.

My brothers don’t live with us, they just visit a lot, and now that I’m leaving to my mother feels lonely.

It hurts my heart but I’m kind of wanting my own place to stay. And it’s embarrassing to goon while your mother’s home.

Not that I do that…

“Mama, you’ve gotta understand, I have to move on” I put the fork down and look at her. “Move on from what? Me? Do you not like it here? God, I’m such a bad mother!” Small tears start to form in her eyes.

My mother being sad hurts me more than anything.
“No mama, you’re an amazing mother, Jamie shouldn’t have brung me moving up.” I glare at James who returns it.

My mother expression changed almost instantly to a warming smile.

I stay in the kitchen for a while, before placing my empty plate in the sink. Walking back up the stairs.

I get back to my room, and sit at my desktop, turning my computer on. I log in and head to google.

I search ‘monster heats and ruts’ and a wiki page pops first, nope I feel like I’ll be lied to.

Huh? There’s a website called Monster Research Group. I click on the link, “Do you want to date a monster but know little about their ruts and heats? Read the article made by a royal scientist monster.”

Should I believe this? No but I’m gonna anyway.

I scrolled down skimming through the paragraphs of non important stuff till I see a headline called Heats

“Only female monster have heats, heats are very similar to female human ovulation. The difference is that monsters are more into touch there animal or feral side than humans.

Signs of a pre-heats are 1. Slurred speech! They’ll sound like a drunk sailor! And will say anything to convince you that you’re their mate.

2. Increased body heat! If you go to hug them and they feel like they’ve been in the sun for too long then you’ve found a sign!

3. Not being shy about saying something. They’ll be pretty blunt about fornicating with you.

Signs of post-heat! 1. They smell like something you or others enjoy. You get the point.

2. They will attempt to swoon you, grabbing you in places you like, cooking for you, wearing something you’ve picked for them.

3. And I can’t stress this enough, they will be very horny! Like ‘I can go for hours’ horny. Mind you heats last for the whole week.”

Ok so don’t smell or touched them. Check.

Oh goodie! More useless paragraphs!

Finally the next one, Ruts.

“Only male monsters get ruts. Ruts can happen naturally or be triggered by a heat. Ruts are somewhat aggressive. They take what they want (hopefully with consent)” I giggled at that comment

“Signs of pre-rut! 1. They seem to be overly cuddly and will cling to you like glue. Hence the name ‘Velcro-puppy’ they’ll whine and complain when their mate isn’t around.

2. They smell heavy, like their sent is weighing you down, it’s to make you scent drunk, so your more comfy and willing to mate. A former mis-consumption is that monsters can’t get humans pregnant with soul sex, which is completely false, you can get pregnant no matter what you do with a monster.

3. Very rough and quick during intercourse, unlike heats where they take it slow, ruts get straight to the point about it. And some monster ain’t shy to tell you so.” Ok stay away from both female and male monsters during heats and ruts. Cool. I scan a few more paragraphs before sighing and turning my pc off. I open the dm with the renters and text them about my research. [New home offer]

Me: hey I’ve done a some research on monster heats and ruts. Or more so how to see the signs.

Them: good! It’s always nice to inform yourself on things ! Say, are you free tomorrow? I’d like to call you sometime.

Me: uhhh sure. I’m free, is 5pm good?

Then: yeah!

I waited for a moment to see if they would text something back. Nothing.

I yawned for the fifth time today, I look at the time 5:30. Eh I can take a quick nap.