Undertale AU Sans x Reader Oneshots

Tubby! Underfell! Sans x Kind! Skinny! Female! Reader

Sans' POV
I got my hotdog and went to the park bench and sat down. I saw a lot of people starring at me in disgust. "Look at that obese monster." A man said with a huge smirk on his face. "What are you a pig?" A woman said. They both leave while laughing. I look down in my stomach. I sigh. Everyone keeps teasing me and making fun of me because I'm fat. Even my own brother Papyrus teases me because I'm fat. I finish throw away the paper to hold my hot dog. I sat down on the bench. I then hear teases from left to right. Then I see a nice fit looking woman that sat next to me. They were wearing a (F/C) sports bra, black shorts with (F/C) stripes at the sides, and (F/C) shoes. She had headphones and water with her. She looked like she came back from a marathon. She looked at me and smiled. "Hello." She waved cheerfully. "Hi." I wave back. She starts to chug down the water. She then makes eye contact with my stomach. She is probably like everyone else.

She then has a thoughtful look. "If you are a skeleton, how do you have a stomach?" She asks. "Magic." I said bluntly. She then just stares at my stomach. "If you got any fat jokes get 'em out. I've heard 'em all." She then has a worried look but then smiles. "Your belly looks really soft." She smiles a bright smile. I then widen my eye sockets and start to blush. "Ohh...ahh...I guess I haven't heard that one before hehe." I smile. She starts to giggle. "Well it is the truth. Why would I make fun of you for it. Everyone's body is beautiful." I smile. "I guess people have been getting to me." She then frowns. She then drinks her water. "Well don't listen to them." (Ok this is weird. Listen was auto corrected to 5'y. WHAT?! WHAT THE FUCK!). "You look great." They give a nice warm smile that can brighten anyones day.

I start to blush even more. "Hey can we hang out sometime I'd like to get to know you better." I advert my gaze from her. "S-Sure." I look back at them. They smile. They write their phone number down on a piece of paper and give it to me. I look at it. Nobody really acts nice to me except Frisk. I look back at the girl. "By the way my name is (Y/N)." They drink more of their water. They also get up to probably continue their jog. "I'm Sans."

I said a bit shyly. She smiles. "Nice to meet you. Well I better continue my jog enjoy your hotdog." They put on their ear-buds and wave goodbye. They start to jog. I watch (Y/N) jog until she disappears and is out of sight. I look back at their number. I smile and start to enjoy my day. (That moment you realize you make one of the main characters fit while you aren't. I'm making this one-shot and I already feel bad about myself since I am not fit).

(Y/N)'s POV
I return home. I take off my shoes and enter the kitchen. I  start to make myself a salad. I chop every vegetable and add some seasonings. I then grab a fork and start to eat. I then hear my phone vibrate. "Mmmm?" I swallow and pick up my phone. I look and see Sans. I smile. "Heyyy." I said while laughing. I hear him laugh on the other line. "Hey (Y/N) would you like to hang out tomorrow?" He says a bit shyly. 'Awww he is so cute. Wait what?' I blush at the thought in my head. "I'd love to. So where are we going?" I ask him.

"How about the famous coffee shop? Then later we can get some Nice Cream." Monsters have been up here for about 2 years. Humans are still a bit mean to them but I like them. They introduced us to new things. One of them is Nice Cream. It always says something nice to you and it tastes delicious. "That sounds perfect. What time?" I said putting more of the salad in my mouth. "How about 10:15pm?" I think about it. I don't have to go anywhere during that time. "Sure. Alright see you tomorrow Sans. Bye." I said in a cheery voice. I'm really excited for tomorrow. "Ok bye." He chuckles and hangs up. I chuckle as well and place my phone down. 'Tomorrow will be a great day.' I smile at my thought of tomorrow.

I then continue to eat my salad.

Sans' POV
Oh gosh what am I doing?! She wouldn't go out with someone like me. I sit down on the couch. Papyrus left to hang out with Frisk and Undyne. "She probably wouldn't go and just not show up." I cover my eye sockets with my bony hands. "Besides she is skinny while I'm....." I remove my hands from my face. I look at my stomach. "Fat." I sigh. I shouldn't have called her. I walk to the kitchen. I open the fridge and get some mustard. "I'm going to bed." I drink while walking to my room. I open my bedroom door and slump on my bed. I then start to drift off to sleep.