Dust!Last Determination!Sans

An Au of a Au of a Au

This is a WIP, please be patient

Backstory
After the human defeated Sans and erased his memories, it repeatedly went on...and went on...and went on...till one day, Sans saw a Door in Waterfall, Sans entered the room, looking for more monsters to kill, Gaster appeared and suddenly he remembered...Gaster told him what had to be done...the skeleton got what they needed...and with his new knowledge, he WILL make sure this is the last genocide