Fairytale Complex - [Undertale | Sans x Reader]

Chapter Twenty Nine | PURITY

          Frisk lays their head on your lap and stretches their legs until they reach where Sans sits at.

          “You know something, dear?” you speak up, after a while of watching the movie, but not really taking it in. “You told me one time that you ending up at the Underground wasn't my fault, so…”

          Frisk looks up at you, while you comb your fingers through their hair and smile.

          “What’s the real reason you fell down, if it wasn't because Jerry and I were always fighting?”

          They smile back at you and close their eyes while you carry on massaging their scalp, their hair getting all over the place, as a result.

          “I just, um…”

          Their gaze wanders to Sans, who immediately notices he's being watched and looks at them, his grin lifting on one side.

          “Promise you guys won't laugh?” they ask, glaring at Sans, and then at you.

          You resist a bigger smile and nod once, while Sans nods too and sits up straighter on the couch to reach for the remote on the coffee table, setting the movie on pause.

          “Promise,” you reply, patting their head and drawing your hand aside.

          “me, too,” Sans says, nodding along to your word. “what's up?”

          Frisk braces themself with a breath and sits up, folding their hands over their lap as they stare down at it.

          “I fell… by accident.”

          Their voice is weak, like they fear you or Sans will break the promise and burst into laughter.

          But neither of you do.

          “I wanted to see if what that History book I needed to study all the time was… true. Because I didn't believe what it said! It said lots of bad things about monsters, and nothing bad about humans, so I was curious, and…”

          “you went to see for yourself and ended up underground?”

          Frisk glances at Sans, whose irises glow warmly, matching with the softer grin on his skull.

          It's still a bit uncanny to witness him express himself like this, while knowing that he's made of metal or… whatever materials Alphys used to create his body…

          But then, you recall how easily Mettaton can have his face express plenty of emotions, and how many humans confuse him for one of their own.

          “Yeah,” Frisk replies, smiling at Sans. “I wanted to know the truth about you guys.”

          “and look where that got ya, buddy,” Sans remarks, nudging them. “sure, ya gave your parents a huge scare, but… it was worth it.”

          Frisk giggles and nods along excitedly to his statement, while Sans broadens out his grin and throws himself back on the couch, relaxing his body again.

          He clicks a button on the remote to resume the movie, and the three of you continue to watch it, until…

          Barely ten minutes later, Frisk chimes in with a ‘wait’.