The Human has done countless Genocides in the au called DustTale. Dust Sans, driven mad by the human's repeated genocides and the loss of his friends, seeks a way to stop them. He encounters a mysterious door and a figure who reminds him of his past mistakes. The figure tells him to finish the "experiment," giving Sans the knowledge to end the genocides once and for all. Determined, Sans sets out to ensure this will be the Last Genocide. Sans, driven further into insanity upon discovering this..