Yandere!UnderLust!Sans X Reader [COMPLETED]

This story is not mine my friend made it ________________________________________ He killed him... He. KILLED. Him. ... He killed them. ... He killed us. ________________________________________

UnderLust Sans x Shy!Reader

Your older sister wanted to vistit her boyfriend Papyrus, personally you just wanted to wait outside... Then you see Sans... want to hang out?