Convinced she'll never find peace after the Anon-a-Miss incident, Sunset Shimmer decides to leave Canterlot High for good. When her friends go after her, they wind up getting lost and falling underground. And when Sunset falls in after them, she's left with a choice.
Escape to the surface and keep her sanity or risk losing herself in the darkness.
Crossover with Undertale. Comission from calinjc