Won't You Stay My Little Honeybun?

You were the assistant to Alphys, her co-worker tinkered on a very curious machine in the same department you worked at, incidentally that co-worker was your chosen soulmate. His name? Sans, Sans the skeleton. You didn't really spend any time with him or rather he was purposefully avoiding you, knowing that he also knew you were soulmates tethered by a soulmate connection. The only reason he allowed you to be around was mostly because of your ability to put things into your memory with excellent accuracy to remember important things like a certain blueprint or a recipe for medicinal use. You had tried multiple times to befriend Sans but everytime he looked quite uncomfortable so you stopped trying to force him into a friendly relationship. One night you had been left alone with the curious machine as you had leftover work to do and one event led to another.

You wish you hadn't cut the string.