Underlie

Underlie is an Undertale AU which focuses on the three skeleton brothers, as Aster (Gaster) is Sans's and Papyrus's brother. It focuses on some of the different resets, but mainly on Aster's backstory and how he was erased from the universe. Eventually, Aster possesses Papyrus and uses him to take the eighth human's soul.
== Story ==
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|-|Part 1=
* Cover
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|-|Part 2=
* Cover
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|-|Basement 03=
* Page 1
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|-|The Machine=
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|-|Underlie Bomb=
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|-|Finale=
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Category:AUs
Category:Concept Change
Category:Special Event
Category:Serious
Category:Grim Bright
Category:Comic
Category:Written story