A human fell into the Underground, and began befriending every monster they came across, including the skeleton brothers. Their acts of kindness seemed to be genuine, giving the monsters no reason to distrust them... Until the human pulled a one-eighty and killed Sans when everyone least expected it. This is the story...
I never meant to fall in love. I never meant to have children. I never meant to become involved in a war. I never meant to lose people I love. I never meant to let us be thrown down here. I never meant to become the royal scientist. I never meant to do lots of things in life. But I always meant to live.
You died. Again. But, when you woke up... You were back at the beginning. You didn't reset... but something was off. Flowey seemed skittish, frightened even. He was KIND. The people you knew, you once held dear... CHANGED. The entire underground was different... Dark. Nobody seemed to recognize you, but a part of them...