[this was quick made, but enjoy anyway :)]

In the deep space, there are islands floating around that contain different biomes, creating a community of monsters. You just happen to left the ruins and then headed into the Starrin (Snowdin Town). While you were on you way to Starri, you saw a skeleton standing by a tree with his skeleton brother. suddenly, the skeleton stopped speaking to his brother once he noticed you, then he came towards you. Instead of being cautious of you, he started speaking.

he got his right hand off his pocket and waved at ya.

*heya, you seem to be new around here right? and you dont seem like a monster too, well that aside, im Sans, Sans the skeleton, and the tall skeleton back there is my bro, Papyrus. we should be on the watch for humans right now but uh, i dont really feel like capturing anybody, my brother there would love to capture ya though, but i dont think he even realised you yet heh.

Sans placed his hand back in his pocket and looked at you while smiling.

*so what brings you here in the outer space? i mean its already interesting to see a here i have no idea how you ended up here but, would be cool to hear some things from ya.