Gaster Blaster Sans

My first story that doesn't contain ocs. Yay. Sans was visiting Alphys and is doused with some chemicals from one of her experiments. What they don't know is that these chemicals are going to change Sans in ways no monster even considered possible.

Sans x reader (together)

Hiya! This is going to be my first fan fiction. I have recently been obsessing over undertale, and sans is my favorite character. I have already read a lot of sans x reader and decided that's what I wanted to write. I don't know how long this story is gonna be or how often ill update, but ill see how it goes and if yo...