Temmie gets bored of the same dialogue from the same people from the same situations every reset. But one day, she manages to create a timeline that is very different than the usual lame conflicts in the other timelines. She decides to experiment with it as she uses her favorite subject.

You released all the monsters from the underground. After that you heard a strange noise. You followed it until you reached a black portal from the world. You felt curious about it and went through it. After a some time you found yourself at the beginning but as you explored it, you felt that you were some where. Across the ruins, the snow, the galaxies. Find your way out. The UnderTale AU doesn't belong to me.