sans has been acting strangely, and pap is confused to... understand what has...occurred.

What is wrong with Sans, and who is Gaster? This is such a reused Description. Undertale belongs to Toby Fox.

Before the events of Undertale. . . All was well in the underground. A skeleton named Papyrus was training to be in the Royal Guard and his skeleton brother Sans was part of the Royal Scientist along with their father Gaster. All it took was one day to change the skeleton family forever. Undertale belongs to Toby Fox Disclaimer: This MY version of how Gaster Sans became Gaster Sans and eventually Gaster Blaster Gaster Sans. This means it is NOT just Gaster Sans.

The barrier has been broken for a few years now. Monsters and humans have been living in peace together . . . for the most part. There are rumors about a monster who can somehow change his appearance into a big, scary dragon like skeleton thing. His name is Sans, and as you find out, he's not really that scary, just scared. This is my first ever X Reader, so keep that in mind. Please be kind and if you have any suggestions, let me know! Also, I guess it's kind of a slow burn . . . Art belongs to me. I don't own Gaster Blaster Sans. If you like this story I'm also working on the back story to how Gaster Blaster Sans came to be. It takes place long before this story when W. D. Gaster was still the royal scientist. You can now ask Gaster Blaster Sans: https://www.wattpad.com/story/76026518-ask-gaster-blaster-sans/parts

The barrier is finally broken, and at last all of monsterkind are free to walk on the surface. Again. Sans the Skeleton is skeptical. Why bother getting excited for something that's just going to reset? This is not the first time the barrier is broken, and probably not the last. He feels the need to take a break for everyone else's enthusiasm and wanders to the ruins where he encounters a ghost of his past. The result of that meeting is something he has been hiding for a long time and that he's determined to keep hidden.