Sans told Frisk something that made Frisk not want to restart. Soon after he was lonely. No one to tell jokes... no one to run for it. Suddenly a portal open up under Sans. Then... you guess it... he failed down He wasn't in his normal body. He was a human! but he got used to it because he got turned into a human by Alphys by accident. He guess he was in a different world by the looks of it. Join Sans on his crazy and weird journey!