Love Me Instead [Sans VS Gaster!Sans X Reade...
Please read part 1 if you haven't!
When a mishap in a reset happens and a character from another version is transported into the current world and timeline, what happens?
Gaster!Sans, bad-skele-boy from EchoTale is confused to see that he had landed in a different, yet familiar world: Undertale! Apparently, in meeting with his 'original' version, they seem to be OK with one-another, UNTIL...
(Thank you, @yourebluenow for the cover!)
If you have not read part 1, look for it! It has the same name and cover, but without 'Part 2' on the title.