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Sub Sans Sanctuary

@marshmarrowsans

Just an Undertale blog co-run by partners in crime Kasha and Cerbie. We're a very informal blog but we'll sometimes do fics, imagines, and reblog shit we like. Both mods are 18+. Kasha: 23 / female / she/her/hers / Has a MAJOR crush on UT Sans I'm the fic-writer unless otherwise stated, and am currently writing whenever the mood hits, whatever the mood is WHEN it hits. I have a Ko-Fi page here: http://ko-fi.com/marshmarrowkasha and super duper appreciate anything you can give. Cerbie: Older than 20 / female / she/her/hers / Also loves UT Sans, but platonically Askbox: CLOSED for imagines/requests but feel free to chat anytime :) AUs we know: Main Universe (of course!) Underfell Underswap Mafiatale (we ADORE this one!) Mafiafell Horrortale

3,540 posts

marshmarrowsans

May 7

picsthatmakeyougohmm

#snickers #nsfw-ish?#does this count as nsfw? XD

SweetDream.ai • Live Cam

•18+ Adults Only

Watch Anya Live on Cam

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.

✓ Live Streaming✓ Interactive Chat✓ Private Shows✓ HD Quality

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marshmarrowsans

May 6

oh yeah here's all the sands i drew on april fool's. 👍

marshmarrowsans

cat-eared-prototype

May 3

crispycreambacon

See you, Chara — 🌻 — 10 years already, huh? At least we made some good memories. Here's to more.

Big thank you to my friend Amiee for helping me out with dialogue! Thank you to Toby Fox, Temmie Chang and everyone else behind this phenomenal game. Thank you to all of my friends that I have bonded with over this game.

❤︎ And most of all, thank you for being here today ❤︎

#Undertale #Undertale 10th Anniversary #missed this one somehow

marshmarrowsans

Apr 25

Happy Birthday Classic ^^

a little late but couldn't forget ab my second fav

#Undertale #Sansy #such a nice soft looking Sans! nice design!

marshmarrowsans

Apr 1

POV: you see a 28 old man carry his 43 year old adult brother in the park

#UT #The Great Papyrus #Sansy #a strong bro!#great work!

SweetDream.ai • Live Cam

•18+ Adults Only

Watch Anya Live on Cam

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.

✓ Live Streaming✓ Interactive Chat✓ Private Shows✓ HD Quality

Anya is LIVE right now

FREE

Free to watch • No registration required • HD streaming

marshmarrowsans

azureoctahedron

Apr 1

dead dove do not eat in practice

#feels like a Sans move XD

marshmarrowsans

skeletonlover69

Mar 11

fine whatever cute sans beam

#oh this is REALLY cute art

marshmarrowsans

Feb 26

HAPPY 10TH ANNIVERSARY, UNDERTALE!!! ✨✨✨

(Edit: To those asking if they can use my art to publish it elsewhere, I'd rather not. Thank you for liking my art! ♥♥♥)

marshmarrowsans

Feb 4

The Signs as Songs from Undertale

Aries: An Ending / Power of “NEO” / The Choice

Taurus: Oh! One True Love / Oh! Dungeon / For the Fans

Gemini: ASGORE / Heartache

Cancer: Fallen Down (Reprise) / Last Goodbye / Small Shock

Leo: Ghost Fight / Dummy! / Home / Home (Music Box)

Virgo: It’s Raining Somewhere Else / Death by Glamour

Libra: Memory / His Theme / Hopes and Dreams

Scorpio: Spider Dance / MEGALOVANIA / SAVE the World

Ophiuchus: Alphys / Wrong Enemy !?

Sagittarius: Metal Crusher / Another Medium

Capricorn: Your Best Nightmare / Finale / Bonetrousle

Aquarius: Undyne / Battle Against a True Hero

Pisces: Reunited / Undertale / Tem Shop

utdr-heritage-posts

utdr heritage post! (2015-10-08)

#its raining somewhere else?? SLAY

marshmarrowsans

Feb 4

WOSJDNDNSJSH SANS 😍😍

More sketches of him lololb he's so pookie bro

SweetDream.ai • Live Cam

•18+ Adults Only

Watch Anya Live on Cam

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.

✓ Live Streaming✓ Interactive Chat✓ Private Shows✓ HD Quality

Anya is LIVE right now

FREE

Free to watch • No registration required • HD streaming

marshmarrowsans

Jan 8

utdr-heritage-posts

utdr heritage post! (2015-10-16)

marshmarrowsans

Jan 7

flowers are uh….blooming

marshmarrowsans

Jan 5

i miss sans, yall, i miss him a lot, i'll be back

marshmarrowsans

Jan 1

Trying something new.

#UT #Sans #oooh he looks SO good here!

marshmarrowsans

Dec 21, 2025

devilishdescent

go to your ass > options > security settings > toggle "kicked" to on

piles-of-dust-and-gay

#have i mentioned i absolutely fucking love queen #might actually be my fave dr character

SweetDream.ai • Live Cam

•18+ Adults Only

Watch Anya Live on Cam

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.

✓ Live Streaming✓ Interactive Chat✓ Private Shows✓ HD Quality

Anya is LIVE right now

FREE

Free to watch • No registration required • HD streaming

marshmarrowsans

Dec 12, 2025

captcha

#this is fuckin dope op

marshmarrowsans

trans-dwightschrute

Dec 11, 2025

Sub Sans Sanctuary @marshmarrowsans - Tumblr Blog | Tumlook