Gaster Blaster Sans X Reader

Part 42

"Nice choice, kiddo" Sans says to you as you sit back on the stool (whoopee cushion removed).

Grillby comes back in with your burger/fries and a bottle of ketchup for Sans. "Thank you" you say. Grillby nods and goes back to cleaning a glass and keeps an eye on Sans.

~~~~~

"So you've really never been here before?" Sans asks you "I mean, I know Monsters haven't been on the surface for very long, but still, you must have at least heard 'bout Grillby's?"

You shake your head, not remembering anyone mention Grillby's. But now that you've been here you were defiantly coming back. Sans takes another swig of ketchup.

"Oh yeah, y/n, what's 'Halloween'? More and more humans seem to be talking about it?" Sans asks you.

~One explanation later~

You couldn't tell what Sans was thinking. You knew he was offended when you told him some people dress up as monsters. Now he is just staring off in the distance. You start to get a bit concerned at how quiet he got, until . . .

"Hey Grillby, have you heard about Halloween?" Sans asks. Grillby nods. "Y/n, do you think this would count as a costume?" Before you have time to say anything, Sans's bones start cracking and as he morphs into his humanoid Gaster Blaster beast. Grillby flares up in shock, flames blazing.

"Grillby? Calm down, I'm fine" Sans tries to reassure, but Grillby only burns brighter. You lean back in your seat, hoping he won't burn you or the building.

"I'm fine" Sans's words ring inside your head. You feel the heat coming from Grillby. Hot, hotter and yet hotter. Your vision becomes blurry and soon black.

And then nothing . . . you can't feel anything.