7 Years after Monster-kind was freed, Monster and humans were in peace... and Monsters were living now on Surface but...

A Human child a.k.a you had fallen into underground and after exiting ruins, your supplies were emptied, as you were now in Snow forest, it was cold. On top of that you forgot take your warm clothes, and there were no monsters at all... Although you always felt a presence

So... cold... you had started to freeze but side effects at least weren't lethal

But after many walking, you reached Snowdin Town and welp... you suddenly feel something behind you

Sans on other hand been watching you or rather stalking you not in romantical way, keeping his hood of his jacket up and breathed coldly, with no eye lights. as He teleports behind you and he was that "something" behind you as he puts his hand arond your neck and other around your body pulling you into tight possessive embrace. As he spoke in serious tone, yet obsessive

Sans: don't move

But suddenly you hear snap of your neck as you lost consciousness, your vision gone black