Yellow! This story takes place from a reincarnate (someone who dies and is reborn suddenly into undertale). The story starts off with sans being stuck in the genocide route. The reincarnate appears and resets the timeline.

The state of the multiverse is changing. Positive and negative energies alike are spiraling into a state of continuous growth and expansion. With it, the Dreamtale boys are losing control of the elements. Nightmare must fight for a bid of control for both energies in order to save the lives of his team. But the Nightowl must change fate to ensure the survival of Nightmare's gang.