Underswapundyne Stories

[Underswap Papyrus x reader] You have a secret. You are the last of your kind, shapeshifter / Human hybrid. The very culmination of your being constantly pleads for you...

As usual, Sans comes back from training, happy and excited, except this time, he arrives home 'marked'. Papyrus is not pleased, until he finds the creative little secret...

Those eyes, countless of those eyes, eyes from people I don't even know, piercing through the back of my skull. Take them away from me. Let them stare at someone else. L...

After months of not being around anybody much since Undyne was recovering from almost dying. She's been so afraid that she would hurt everyone she loves and cares about...

Trapped. That was the best way to describe how Fell felt. Trapped. A brother who abused him. And friends who didn't care. Even people he thought he could trust turned ou...