~Sans Pov
I was still smiling, but then I thought back to when (Y/n) was pale and sick. What happened to make her recover so quick?
"Hey brat, wanna leave for a second?" I asked Frisk, they looked at me and saw I wasn't playing around and left to find Papyrus.
"Why did you call Frisk a brat?" (Y/n) asked me as I felt my smile fade.
"They don't take it personally, but I gotta ask you something, do you promise to tell me the truth?" She nodded.
"Of course, why would I lie to you?" I shrugged.
"How did you get better so quickly? One minute you looked like you were about to collapse, then the next, you're all better," she bit her lip, hesitating. Great, she isn't going to tell me the truth.
"Well, I was getting sick. I haven't had the sun in a while and humans need it to survive," my eye-lights disappeared, she could die down here," but, Frisk has some pills that restore what the sun gives me so I should be fine!" She tried to make me feel better, it was sweet..... but not enough.
"Why did you have to fall down here?" I asked her, starting to lose my temper, I couldn't handle it. There has been a few timelines where (Y/n) has died, cold, being attacked by a monster, Papyrus, Flu, and other ways.
"Cause I wanted to see you, and stay with you," she responded kindly, trying to keep me calm.
"You're gonna die down here, (Y/n), we don't have all the things a human needs to survive, I don't want that to happen!" I growled, my eye glowing red.
"Sans, please, calm down. It's goin-"
"Don't tell me it's going to be okay! There has been so many timelines where you have died!" I froze up.
~(Y/n) Pov
"What's a timeline?" I asked. He calmed down and sighed. Once he explained, I was in shock.
"This has been the first timeline that Chara and your powers have showed up," he told me. How come I don't remember them but Sans and Frisk does?
"Frisk is hoping this could be the timeline that's a true happy ending, so they don't have to reset anymore, they only reset if you died or just curious," he told me. I stood there, still frozen.
"How many timelines have there been?" He thought for a moment.
"20, I think,"
"How many have I died in?"
"17," he looked at the ground.
"I'm going to Agsore," Frisk had came in and told us," I unfroze
"Frisk, you could die!" They shrugged.
"I've done it before without dying, please I wanna do this while you're still in good health," they smiled. I sighed, if they don't survive......
"Thanks Frisk," Sans smiled.
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Word Count:473
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An Old Friend ' Underfell Sans x Reader '
FanficYou and Sans had been friends since you were little, when the monsters had to leave, you were really upset that your only friend, Red as you called him, had to leave. Will he remember you after 7 years of being in the underground? Or will he just fo...
