Undertale AU Sans x Reader Oneshots

Jasper x Reader

Requested by: @Crystalzoura1
(Jasper is 12 (1200) and you are 13).

Jasper POV
I was waiting for them to walk straight through that the door. After a few minutes I hear the door open. "(Y- oh it's you dad." "Wow. Not happy to see your own father?" He sounded disappointed. "I'm sorry I'm just waiting for (Y/N) to come." I look down on the floor. "Aww you like (Y/N) don't you Jasper." I look up at him and he is smirking. I feel heat rise on my cheek bones. "No." I mumble. "Really because judging from that expression you do. You are blushing." I cover my face with my hands. I hear my dad chuckle. I heard the door open but I still had my face covered. "JASPER!" I knew that voice anywhere. It's (Y/N). They hug me. "It is so good to see you." They give me a bear hug. "Hello Sir Fallacy. It is good to see you again too!" They yell and give my father a hug. "You have been gone for a day." He points out. "I like being with you guys." (Y/N) lets go of him. My dad leaves. "So what are we going to do today Jasper." She turns around and looks at me. "Um whatever you want (Y/N)." They put their hand under their chin.

"I may not be good at them but I like pulling off a few pranks here and there." They smile at me. "Alright." I smirk. (Y/N) smirks too. "Who should go first." They asked. "My dad." We walk off. "What should we do?" (Y/N) asked giving a thoughtful expression. "My dad loves tea and they are going to prepare it soon. Why don't we replace the tea with something else." "I like that." We speed walk outside. We get what we want and head towards the kitchen. We move around sneakily. No one has seen us which is very surprising. "We have to prepare Sir Fallacy's tea. Hurry." A maid yelled. I saw the tea. I replace with a different cup. It looks like they were all in a hurry. They took the tray immediately. Me and (Y/N) walk out of the kitchen. (Y/N) stars to giggle. They are so cute! "We have to see this." I nod and we follow the maid that has the tray. She leads us to his room. She opens it. "Sorry it took so long here." I see my dad take the tea. She leaves. He closes the door. We walk up to his room and lean against the door.

"This is going to be funny." They whisper. I start to laugh a little but I cover my mouth.

Fallacy POV
I sit down on the bed and I drink my tea. It tasted odd. Very odd. It was really hard to swallow. I look at the cup and see the cup filled with mud, dirt, and leaves. I spit it quickly. 'Who made this?'

(Y/N) POV
I hear him spit out the 'tea.' I grab Jasper's arm and ran behind a pillar. "Why did you do that (Y/N)?" He asked. "Because I heard him spit it out. He will leave soon." I respond with a few giggles. I look back at his room and he looks mad. He flies to the kitchen. I start laughing so hard. "That was amazing." I said trying to contain my laughter. I wipe away a tear. I also see Jasper laughing. "He is going to be mad." He wipes a tear away as well. "Your so much fun to be with Jasper." I smile at him. His face turns into a hot magenta. "T-Thank you." He stutters. I hug him. "You are so adorable." I squeal. I see his face covered in hot magenta. I laugh a little. "Don't be embarrassed Jasper." I let go of him. "Lets go see your dad's reaction." I grab his arm gently and we speed walk to the kitchen. We look through the door.

"What in incarnation did you do to my tea?!" He yelled at the chefs. "We gave you tea. Just the way you like it." They said nervously. "Well I don't like it when it has mud and dirt!" He yells. "What we made your favorite tea." They looked confused. I look away and laugh quietly while my back was against the wall. Jasper does the same. "Lets leave." He said. I nod and we leave while giggling. We walk into his room.

"That was the best thing ever." I laughed after after I said that. "That was hilarious." He laughs as well. Who wouldn't well unless you are Fallacy. "Aww man. Oh look it is noon. Wow time flies when you are having fun." I look at Jasper. "Yep I guess you are right." He looks sad. "Hey what is wrong?" I hold his chin so he looks at me. "I don't want you to leave." He adverts his gaze. "Hey I'll ask my parents if we can have a sleepover for a few days. How does that sound." He looks at me and gives me a smile. "Now there is the Jasper I know and love." I hug him. "You love me?" I nod. "Of course we are best friends." I hug him tighter. 'Maybe we can become more than friends some day.' I feel my cheeks heat up a bit at the thought. "Right....friends.." He stays silent.

I let go of him. "Hey remember we have the whole future ahead of us. Well I have a short one since I'm not a vampire." I giggle a bit. He giggles a bit too. I hear the door open. "(Y/N) your parents are here." Fallacy said. I get out of the bed. I then feel arms wrap around me. "Please don't go." Jasper whines. "Hey remember what I told you." I continue to walk but it was difficult since Jasper was holding me back. I reach the door and see my parents. "Ma papa can I have sleepover with Jasper for a week?" I asked them.

They look at each other. "Alright but only a week." My dad says. "Love you." I give them a hug. They leave. "Who planned it?" Fallacy said. I point at myself. "Oh I thought it was Jasper since he does l-" he was cut off when Jasper covered his mouth. "I'm sorry what was he going to say?" I ask. Jasper looks nervous. "Nothing my father is just saying things." Jasper gives his father the death glare. I giggle a bit. "Alright. You don't mind me sleeping with you right." I said. Once I said that both Jasper and Fallacy have colored skulls. "Ugh like sleeping in the same bed." I glare at both of them. They laugh nervously. I walk off to Jasper's room. I lay on the bed. After 5 minutes Jasper comes back with clothes in his hands. "Change into this." I take the clothes. Jasper leave the room. I put on a baggy shirt and pants. I open the door. Jasper walks in. "This going to be fun." I jump on the bed. "Come and sleep next to me." I sit down and pat at the bed. He walks over and takes off his shoes. "Do you sleep like that?" I ask him. "Um yeah." "No no no take it off and put some clothes you can sleep in." His face is magenta again and he starts to take his clothes off. He leaves his pants on.

He joins me in the bed. "Comfortable?" I ask. He nods. "Why are you embarrassed?" I smile at him trying to make him have some confidence. "I never slept next to someone." He looks away. I snuggle up to his chest. "W-What are you doing?" He stutters. "For a skeleton you are very warm." I say with satisfaction. He wraps his arms around me. "Hey Jasper did you know I love you." I look at him. His eye sockets widen. "Really?" He said. I nod. "I love you too." He hugs me a little tighter. I kiss his cheek bone.

Jasper POV
I can't believe (Y/N) feels the same way. I'm going to love this week.

Surprisingly this took so much less time. I'm very surprised since I take like 4 hours to make a story since I'm a bit lazy. Anyways I hoped you enjoyed this and I will be taking requests. Tell me anything and  I will do it.