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  • A Dangerous Love (Underfell Sans x Reader)
    31.1K 892 47

    I DO NOT OWN THE COVER **TW** THIS X READER CONTAINS SEX, VIOLENCE, SELF-HARM AND SUICIDAL THOUGHTS. IF ANY OF THIS TRIGGERS YOU, PLEASE DO NOT CONTINUE. I couldn't take it anymore... I wanted to end my life. She's dead now and I didn't have it in me to help... Watching helplessly as her body drained of blood... That...

    Mature
  • ~Why do you care~ [Underfell Sans X Reader] [•COMPLETED•]
    238K 6.5K 51

    Warning: possible swearing, inappropriate humour, perhaps lemons? Idk. Just stop being a goody two shoes and enjoy the book, kid

    Completed   Mature
  • An Old Friend ' Underfell Sans x Reader '
    104K 2.8K 30

    You and Sans had been friends since you were little, when the monsters had to leave, you were really upset that your only friend, Red as you called him, had to leave. Will he remember you after 7 years of being in the underground? Or will he just forget about you? To find out, read 'An Old Friend' Underfell Sans x Rea...

    Completed   Mature
  • (Underfell sans x reader (female)) UNDERCOVER
    492K 17.3K 64

    You're a human that has fallen into Mt. Ebott on the year where all humans dress as monsters...Halloween. So how will the monsters know if you're a human or not?

    Completed  
  • An Oath of Mercy || UnderFell Sans x Reader
    19.7K 765 14

    One clumsy moment and a broken leg are all it takes to leave you at the mercy of the very edgy and very hostile monsters of the underground. Thanks to your knowledge as a doctor (and oath to do no harm), you're able to convince the Great and Terrible Papyrus to keep you alive. But how are you going to find your way ba...

    Completed  
  • New toy { Underfell sans x reader (smut) }
    15.6K 204 26

    He's sick and twisted and you can't get enough of him. "You feel as if an invisible chain was wrapped tightly around your soul, and with its suffocating grip, it was connected to Sans, who was yanking you along with every step he took." ⚠️⚠️TW'S⚠️⚠️ force, pills, kidnapping, drugging, blood, HEAVY gore, abuse, and sm...

    Mature