Your Colour is Red {Yandere!Swap!Sans X Abused!Reader}

"She's dead!"

You look down at the bloody mess on the snow. You best friend, Muffet, was now lying in pieces. There was no evidence left anywhere. This was outrageous. Your best friend is dead and there is nothing that can help in telling who was the killer.

Little did you know that It was the very person who told you that he loves you the most.