A Certain Obsession- Undertale Sans X Reader

Transformation

You walk over to the intresting machine and you see A red button. It fills you with DETERMINATION to press it.
"Thanks for lettin' us come in all of a sudden, Alphys." Sans thanked alphys with a shrug. "Oh! U-uh....N-No problem S-Sans." She said all shy. Then Alphys turns to look at You, about to press the button. "FRISK! DON'T PRESS THA--!!!"

And so it happend.

You clicked the button without hearing Alphys's words. Then a beam shot at you, it was like a gaster blaster blasted right at you. Smoke was all around. You opened your eyes but couldn't see anything. You coughed from all the smoke entering your lungs. Then the smoke faded, and you felt.....Taller. like you wern't even in your body. You look at Alphys, her pupils so small from shock that you almost couldn't see them, and Sans' eye sockets were dark with shock as well. "What?" You asked, confused. You noticed your voice seemed older, and more smooth. "U-U-Uhm....Frisk.....You might wanna look in the mirror." Alphys suggested to You. Still amazed by what had happend to you. You turn around and you see yourself in the mirror. You wern't 10 anymore......You were a teenager!

"WHAT THE?!" You Yelled with confusion, feeling your long hair and your long legs. You even noticed that you have wider hips and bigger theighs. You turn around, Alphys had the same expression. But Sans....He was blushing, a lot. You wondered if it was because of you.

"Uhm....I'm gonna go try to see If I can fix this. R-Run along, you t-two." Alphys walked out of the room looking like she just saw a ghost. "So, uh, Kid....Wait, your a teenager now, uhm, Can I....Still call you kiddo?" Sans asked as you walked towards him. He was a little shorter than you. 1 or 2 inches to be exact. "Yeah. Of course you can." You said with your new voice. You didn't know what to think as you left with Sans. He teleported you this time. We walked into the house. Not saying anything to eachother. You sat down on the couch. Looking down apon your new legs. Then Sans come by with his indoor hoodie on, and sat down next to you, finally speaking. "So Kiddo. How's the new body?" "Well, I was a little wobbly at first, since I'm not use to these legs. But I think I'm getting the hang of it! I like it!" You declared with joy. You then looked at Sans, He smirked, but not in the way he usually does. It was a different smirk.

*You remember Mettaton once telling you that someday a guy that likes you will stare at your beauty with a funny smirk

You then realise. 'Does Sans......Like me?!' You thought.

(Art credit to shinnie shys)