You and Sans had been friends since you were little, when the monsters had to leave, you were really upset that your only friend, Red as you called him, had to leave. Will he remember you after 7 years of being in the underground? Or will he just forget about you? To find out, read 'An Old Friend' Underfell Sans x Reader.

A fan fiction from a fangirl who needs to go to therapy once and a while ~Darky

Why does Zim love you human? Zim does not know, you are my queen/king human. Art belongs to @Tsundere_Doll. Invader Zim characters belong to their rightful owners. The videos and pictures in the book do not belong to me.