We're The Stars (The Regret 1)

Sans x reader ('~')
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You are a famous singer in the surface world. After Frisk destroyed the barrier, the monsters made peace with the humans and some even became your fans! Soon, you met Frisk's friends and became close with each other too!

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Crappy but still edible to read. By the way guys, this is music based story. I do NOT own the musics and Undertale.