My Skeleton Hero {sans x reader}

(y/n) and frisk are the fallen human to the underworld,Will they survive to fight the monsters?,Will (y/n) find her hero in the underworld?,Will frisk
help y/n,to survive EVERYTHING?
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Hey guys this is my second story,I have to rewrite everything,my phone SUCKS,okay let me now do the FUKING STORY!,sorry :(
WARNING:there are some curses, sexual words and sexual actions(sorry,if u r inoccent)
U HAVE BEEN WARNED