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Between Stars And Shadows ~Evil Sanses x F! Reader by CrossX_X
Fandoms: Undertale (Video Game), Underverse - Fandom
29 Mar 2026
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Summary
When Y/n awakens, there is nothing—no memories, no past—only an endless void and the faint echo of her own name. Alone and afraid, she drifts through the emptiness until a golden skeleton named Dream Sans appears. He claims he’s there to bring her somewhere safe… before someone else finds her first.
While Y/n is getting accustomed to her new life, an ambush shatters their peace, and Y/n is torn away, captured by the infamous Bad Sanses—a group feared across the multiverse. Now trapped among dangerous beings like Nightmare and his servants, Y/n becomes a prisoner at their mercy.
The Star Sanses scramble to find a way to rescue her before it’s too late. But as time passes, something unexpected begins to happen. The skeletons she was meant to fear begin to reveal cracks in their cruelty—fragments of pain, loneliness, and twisted loyalty. And as Y/n learns more about them, the line between captor and companion begins to blur.
What starts as captivity slowly turns into something far more dangerous.
Because the Bad Sanses aren’t just keeping her alive anymore.
They’re falling for her.