Under the mean face(Underfell Sans x reader)[COMPLETED]

The king

My eyes started to open slowly, my vision still blurry. I was laying down on a bed of golden flowers. Someone by my side, snoring softly. I ran a hand through my hair before sitting up and looking at the person beside me. .....
.....
Oh my god, was it really him?

You- Sans?

He growled softly then rubbed his eyes with his boney hand. When he saw me, his face lit up.

Sans- (y/n)! You're finally awake! I've been searching you for so long, I convinced the king to not kill you and find another way to break free! I'm so happy!

He leaned forward and kissed me. I closed my eyes and suddenly, a stinging pain rang through my head. I slowly opened my eyes..... no....no no no no no! I found myself strapped up on a table with a glass cylinder beside me and many wires, tools and bottle filled with colorful fluid. I started to cry as I realized that it was only a dream. Of course, in reality, Sans didn't care about me, he never came to save me nor did he searched me. I was probably just a pet, exactly like the first time we met. I toy that he could play with whenever he wanted it. Steps could be heard as the metal door opened slowly on a very angry Alphys. She still had the bandages that I made her but her twisted smile was deformed into a furious expression.

Alphys- Well well, if it isn't my kind little (y/n). Wait... she's no longer kind now, no, you're a bad girl! You took one of my fingers!

You- You took three of mine, two of my toes, a liter of my blood and my happiness so don't act like you're the victim you bitch!

Shit, why did my mouth said that! I jist signed my death! Fuck, where did that confidence came from?! I'm doomed! She looked at my with a surprised face at first, but soon, it morphed into a furious burning rage. She took the scalpel and stabbed my tibia. Then she took a hammer and broke the same leg. A blood curdling scream came out of my throat. I screamed so loudly that she had to cover her ears, I struggled, not caring about the sharp pain that was running through my whole body. I screamed again, even louder but I stopped abruptly when a flash of red caught my eye. Heavy footsteps could be heard from outside and the door bursted open. A skeleton was standing in the doorway, his red eye smoking and he was furious. If I wasn't so in pain, I'd be smiling. Sans was there! He finally found me! He took out his hand of his pocket and a red aura flashed around his palm and around Alphys. Sans thrown her to the wall with his magic and then to the ceiling and the floor, he did it so fast and hard that Alphys couldn't even breath by now. When she fell unconscious, he stopped and rushed to my side, removing the straps around my bloody wrists and ankles. I was crying and I let myself fall in his arms, I heard him crying too. He was smiling and hugged me tightly.

Sans- You're alive! (Y/n), I was so worried, I'm so sorry I didn't find you earlier. I thought you were dead.*sob* We need to get out of here.

You- W-wait, Sans, w-we need to help the o-others.

Sans- Right, I'll use my shortcut to bring you all to Snowdin, but I'm not sure I can bring everyone at the same time. How many are they?

You- About fifty, they all need to get out of here. Are you sure you can shortcut them all?

Sans- I can, but they'll need to make a chain, and I can only bring fifteen at a time so we'll do groups.

I stood up with a nod and Sans helped me to stood up.

You- Sans, we need one of Alphys's fingers, it's tactile doors.

Sans- Oh, ok I guess, it's not like she deserved to not suffer anyway.

He ripped off a finger, waking Alphys up with a scream. She started to cry and insult Sans, but he only left, supporting me. We freed fifteen prisoners at a time so Sans could all teleport them. After the first group, Sans came back, panting a bit. The second group, he started to sweat and huff a bit more. The third group, he was panting heavily and sweating, I asked him if he was okay for the last group, but he only said that they were less so he'll manage. We were only six left so it'll be easier for him. He wrapped an arm around my waist and squeezed me a bit to bring me closer, he took the arm of the first prisoner as the other were all holding each other. Sans closed his eyes and teleported us in front of Grillby's with the others. Everyone was in the bar when we appeared there. When we touched the ground, Sans passed out, gasping for air and sweating. The prisoners left got inside as I tried to wake Sans up and calm his breathing. He was still huffing and his soul was beating really fast. I took a deep sigh and kissed him, blowing air in his mouth to help him. I did it a few more times before he finally calmed his breathing. He was still unconscious so I pulled him slowly toward the door of the bar. Hissing in pain as my broken leg hit Sans accidentally. I was struggling to bring him inside but I managed. I asked help with a loud voice. Some prisoners came to carry Sans and two others to support me and treating my wounds. A purple fire man came across and help healing my leg. He placed his warm hands above my damaged leg and a warm green glow emitted from his hands. Magically, my leg placed itself right again and the pain left, when he stopped, the only thing left was a large bruise. I thanked him before walking toward Sans. He was laying down on the counter, huffing a little and muttering my name. I smiled a bit at him then turned back at everyone.