UnderCrash is a AU based off of human frisk on a pacifist route, but this time was different..They spared all of the monsters and is on their way to Asgore, but something "crashed" or glitched if you will call it, they were not meant to fight sans..not yet anyway! They had no LV and was not on a genocide route! But whatever..they could just spare them, they will understand, right? But once they starting sparing sans, it kept crashing, their menu screen, when they tried to hit "mercy" it kept going to "act" or "check", The last time they hit "mercy" it crashed into "fight" and ended up killing sans. They were upset because they could not complete the pacifist route now, for they had LV. so..they reset, but sans wasnt there, its like their NPC had been removed from the game- they kept reseting..and reseting..They could not find sans anywhere..like they just drifted away..They completed the pacifist route without sans and who knows what they are doing right now?! This AU was forgotten, until now..