Undertale AU Sans x Reader Oneshots

Blueberry x reader

I lived with the skele bros for awhile now. I was a bit sad that they couldn't go to the surface. I always spoke to Undyne to see if we can find anything to break the barrier without killing me. Everyone grew fond of me. They didn't want me to die. I grew fond with everyone as well. Especially with Sans. When I got to know him I developed a crush on him. I was afraid of rejection and ruining our friendship so I kept my feelings bottled up.

I was at Undyne's lab to see if we can find anything. A few hours pass. "It is ok we can find a way next time." She said sweetly. I only nod and leave her lab. I was determined to find another way. I walked back home. I went inside and saw Papyrus smoking. "Papyrus. Don't smoke while I'm in the house. It is bad for me and you." I said a bit annoyed since he never listens. "I don't have lungs." He stated still smoking. "But I do and I breath air. Which means I breath the smoke. That is second-hand smoking. So please stop." I say while going to the kitchen. Looking for something to eat. Once I open the fridge Sans comes home. "PAPYRUS! STOP SMOKING! IF YOU'RE GOING TO SMOKE WHICH YOU SHOULDN'T AT LEAST DO IT OUTSIDE!" Sans yelled and scolding his brother.

He walks into the kitchen. "Hello (Y/N)." I just waved. I wasn't much of a talker. "You hungry?" He asked. He is always quiet when he talks to you...at times. I nod. "LET'S MAKE TACOS!" He yelled. He yells when he is excited or mad. I help him make tacos. I always give him tips so his tacos are edible. "PAPYRUS COME AND EAT!" He called for his brother. "Can't going to Muffet's." He said lazily. "OH NO YOU'RE NOT!" Sans runs to the living room but Papyrus already was out the door. "UGH!" He groaned in annoyance. I put my hand on his shoulder to help him calm down. "Thanks (Y/N) I needed that." He gave you a smile which made you smile. "Hey. More tacos for us then." I said very quietly. (Tacos was auto corrected to racist. LOL). He smiles. "LET'S EAT!" He yelled in a cheerful tone. We walk back to the kitchen. We sit down and eat.

Sans' POV
We ate tacos. They were delicious. I love getting tips from (Y/N) especially since I get to be near them. But I felt sad they never talked a lot. I wanted to hear their voice more. "(Y/N) how come you don't talk a lot? Is there a reason?" I asked. I wonder if I can get her talking. (Y/N) shook her head. So she doesn't have a reason. "Not much of a talker?" I stated. They nod. We were done eating tacos.

(Y/N) got up and took the dishes and was about to clean them but I spoke. "Let me help human." I suggested. They look at me and give me a warm smile. I feel my cheek bones heat up. We both wash the dishes. Our hands touch each other's. I blush at this but continue washing.

We were finished and we went to the living room and watched TV. "What do you want to watch human!" I yell but a bit softer. They shrugged. "Please human...talk a little." I asked. I want them to talk more. Be more open with me and Papyrus. The human only talks for lectures. They sometimes talk when they complain about something. They kept looking at the TV. I sigh. We watch a comedy movie. There was a funny scene on. (Y/N) laughs. I blush. Their laugh is so adorable. "Sans? Can you please call me by my real name? Please? No offense bit I don't like being called human." (Y/N) said. At least they talked. "Sure...(Y/N)." They smile.

We went to our rooms and slept the night away.

(Y/N) POV
I woke up and got dressed in (F/C) hoodie, (F/C) shirt, black jeans, and (F/C) gym shoes. I did my normal morning routine. I wrote a note I will be at Undyne's lab. I left and went to the River Person and we went to Hotland. I knocked on her door. She opened it. "Oh h-hey (Y/N) r-rea-dy to st-st-ar-t?" She stuttered. I only nod. I walk in. We look in the books and I notice something. It says you need seven human souls, but the book doesn't say if the humans need to be alive. It just says it needs seven human souls.

I motion for Undyne to come over. I showed her the passage. She looks at me confused. "What are you trying to show me?" She said without stuttering. I was proud but more focused on getting them out of here. I groan. I don't like talking. "The book says you need seven human souls. But it doesn't say if the human is supposed to be alive or dead." I said quietly. She looks surprised. "You can talk?" She asks with her eyes widening by the second. I nod. "You found the answer and can talk. Why didn't you say anything your voice is adorable." She says while hugging me. "I don't like talking much." I said quietly once again. "I understand. Since you found the answer let's celebrate with ANIME!" She yelled at the word anime. I smile at her.

We watched anime for 3 hours. It was 2:00 in the afternoon. I get up and head home. I wave goodbye. I make it home happy that now everyone can leave the Underground. Undyne said she will tell the queen. I sat on the couch and doze off to sleep.

Undyne's POV (didn't expect that huh).

I go to the queen. "Qu-Queen Toriel? I ha-ve som-something t-to tell y-ou." I stuttered. "Go on. Take your time." She said sweetly. I explain it all to her. "Get (Y/N)." She says. I nod and leave.

"Sans' POV
I saw (Y/N) sleeping on the couch. I sit next to her then I realized she was smiling and crying. What was going on? But I feel happy she is smiling. She must have had a good day. Or is having a good dream. My thoughts were interrupted because Undyne came through the door. "We need (Y/N/) to go to the queen to...test something." She said without stuttering. I shook (Y/N). They woke up. "You need to go to the queen." I said to them. I wonder why she needs (Y/N)?

The 3 of us go to the River Person. We made it to Hotland. We then walked to the queen's throne room. "Ah (Y/N) you are here. Undyne already told me. Should we test it out?" She asked and (Y/N) nods. What is going on?! We all went to the barrier. (Y/N) summoned her (S/C) (soul color). It was beautiful. Then the rest of the souls surround there's. A few moments later a bright white light erupts. The barrier is broken. And (Y/N) is still alive.

"Sans you can finally see the stars. You all get to go the surface!" She yelled. She was crying tears of joy. I ran up to (Y/N) and hugged them. "Thank you so much (Y/N)." I said while crying too. "Tell the everyone in the underground." Said (Y/N) happily. Toriel and Undyne nod.

2 months later

(Y/N) POV
Everyone has settled in. I was so happy everyone finally went up to the surface. I started talking much more. I still live with the bros since I helped them move in. Also since I lived with them in the underground. It was early summer. "So Sans are enjoying yourself up here?" I asked with a smile on my face. "Yeah I did get to see the stars. But some humans aren't excepting us like you are. But it will get better....hopefully." He said with stars in his eyes.

"Aw you always look at the bright side. That is what I like about you Sans." I said a bit embarrassed since I kinda just confessed. He had blush on his face. "You like me in that way?!" He said with hearts in his eyes. I nod. "I like you too (Y/N) ever since I met you. I know you didn't talk much back then but you were always a sweet person even though you didn't talk much." He said while blushing even more.

"Awwww your such a cute cinnamon roll." I hugged him. I looked at him and he was a blueberry. "(Y/N) would you like to go on a date with me?!" He yelled still blushing. "Sure...oh wait be right back Sans." I went upstairs to my room. 6 minutes later I come back down stairs. "To show how much I love you I dressed up like you except I have shorts on." I said with this cute outfit on. He was blushing even more if possible. "Let's go! I know where we can go." I pulled his arm.

We made it to the park. Some people where staring but I don't care I love my little blueberry! Monsters were cheering since we are together. "Hey you guys look so cute together!" Said a female voice. Me and Sans turned around. "Aw thank you. You guys too." I stated. "I'm Eve and this is my boyfriend Daniel." Eve said. "Hello nice to meet you." Me and Sans said in unison. "Daniel why can't we do that. Dress up as each other?" Eve complained. "I did it so I can show how much I love my little cinnamon roll." I said while hugging sans.

"You too are matching and it looks so cute." Daniel stated. "I guess you can say we are a match made in heaven." I made guns with my hands. Eve and Daniel laugh a bit. Sans looks at me angrily. "You're funny well hope to see you guys around." They both said. "C'mon Sans lighten up." I picked him up since he is at my waist. I sit down on a bench while Sans sits on my lap. "Stop with the puns you are becoming like Papyrus." He said angrily. "Aw Sans c'mon." I say pouting. He turns his back towards me. "I guess I can't be your girlfriend if you hate me." I say with a fake sad tone. He turns towards me and hugs me. "No stay with me please. You know I don't like puns." He said with a sad face. "Ok. I love you so much." I then kiss. She stiffed but kissed back. It lasted for 20 seconds.

We pull away and his eyes eyes our hearts. "That was amazing. I want another." He kissed. Me I kissed back. "I love you my little blueberry." I hug him. "I love you too my lovely human." He nuzzled my neck. We cuddled at the park bench. 'He is so precious to me.'

Another one down more to go. Hoped you enjoyed this and still taking requests. I'm out! Bye!