Then when sans and papyrus was in the hotland part of the void they found a Secret monster her name was I'm sorry for some reason "who is this?" Sans said
"I think her name is "I'm sorry" for some reason" papyrus said then they both spared her and she said that she was sorry.Then they found the snowdin part of the void and they seen a black figure "THAT MIGHT BE THE PERSON PAPYRUS" sans yelled and papyrus said "I think so please don't yell" then they went up to him and gaster said "sans papyrus its me your brother" "WHAT?!?!?!?!?" Papyrus said "i Knew it he WAS our brother" then they got to know each other more then they got out the void "glad to be home right sans and gaster?" Papyrus said "YES BROTHER IT IS GLADE TO BE BACK HOME" sans yelled "yep it's nice to be home" gaster said then they all lived together and made lots of tacos until they meet someone new.The End.
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Underswap:The great gaster?
ActionIn this story underswap sans and papyrus go to find gaster because they think that he is there lost brother and papyrus comes because he just wants sans too be safe.