Undertale AU Sans x Reader Oneshots

Error! Sans x Flowerfell! Reader

(Y/N)'s POV
I was on the couch binge watching as Frisk and Sans were in the kitchen giggling to each other. Those two have been dating for over a year since Frisk and I fell down here. Frisk is my twin but we are fraternal twins. All I can hear are giggling, screaming and laughter in the kitchen to the point where I can't hear what's on TV. I stand up and walk in the kitchen. "Can you guys please be quiet? Please?" I'm always quiet around them especially Frisk. She is covered on flowers because she always defends me and I wish I was as strong as her. My right eye, part of my hands, and part of my legs are covered in flowers but Frisk is covered by them. They always pop out of the fabric which makes me see her flowers every day. Frisk smiles at me and navigates herself towards me.

She feels my face and still has her heart warming smile that I love to see. "Ok." She pulled one hand away but kept the other one on my left cheek. I start to frown. I then get pulled into a hug. "Remember (Y/N) it's not your fault. I'm not strong like you but please know none of this is your fault, ok?" She rubs my cheek like our mother used to do. I nod my head yes as I try to hold back tears. "Let's all watch TV." We all get on the couch and watch TV. Even though Frisk can't see it, she can listen. I still wish we can cure our flower disease.

Sans and Frisk both fell asleep as I read a book Papy gave me. He is like a brother but also a father figure for me. He always wants me to read so I don't end up like Sans even though I don't think he is stupid. He also comforts me and teaches me how to cook with Undyne. Papy and I are very close friends. Then I heard a ripping noise and screaming. This caused Sans and Frisk to wake up. Sans looks at me for answers of what was that noise even though I'm just as confused as he is. We all run outside and see tress falling down. None of us could see the cause of it though. I look at Sans to see and hear him mumble something. I couldn't comprehend what he said but it made him worry. "You two have to get out of here now." He says sternly. Frisk shakes her head. "Not without you." She holds his hand. He smiles but it quickly fades away as he eyes the trees. Frisk then gasps and runs towards me, somehow. "We have to get (Y/N) out of here. Their life is far more precious than mine. Here." She takes off Sans' jacket and hands it to me.

I hesitantly take it as Sans looks at me with sorrow. Tears are already falling out of my eyes. He takes off his scarf and star necklace. He puts it on me and the jacket as well as I was now all bundled up. Sans looks away and opens a portal that lead to a white, empty place. "Go in there, you'll be safe." I take a few steps towards it and turn around with my tears on my face. I run to them and hug them both. "Please don't leave." I cry out every word I said. They both hug back. Sans pulls away and looks at me as he starts to cry himself. "Listen (Y/N), we both love you and we don't ever want to see you get hurt. So live for us." He says with pain in every word. We were both crying really hard as Frisk was breaking down too. I shake my head 'no'. "I can't leave you here." A tree then falls down. Sans looks back at me. He uses his magic and puts me on the other side of the portal. "NO!!!" I run towards them as Sans closes the portal. "Take care of yourself (Y/N)." Is the last thing I ever heard from Sans. The portal closes as I fall to the floor. This can't be real! It just can't! They can't be gone!

With the little energy I have left, I lift up my body to make sure I'm just dreaming and the portal is still there.

It wasn't there

I fell to the ground as I just stare at the white wall. "NOOOO!!! YOU CAN'T BE GONE!!! Don't leave me alone." I cover my eyes as I whimper and cry pit every tear my body can make. All the crying lasted for 6 minutes. I look at the jacket, scarf, and necklace. "This is all I have left of them." Sans gave Frisk his jacket since he has dozens of the same jacket. Sans had this scarf and necklace for a long time. I get up and zip the jacket up, and pull the hoodie over my head. All the fluff around it covered my face but not enough to where I can't see. I start to walk forward to see if I can find anything.