Controllable [A Kustard Fanfiction]

Book Edit #1: Changed he name of the book from 'Two Different Beings' to 'Controllable'

"How could a monster and a robot fell in love with each other?"

Sans is a robot, created by W.D Gaster. He has only one purpose for his so called 'existence'. To kill the humans which are fallen into the underground and collect their souls to break the barrier. But, his purpose for his so called 'existence' might be more than just that...

Red is a monster from the alternate universe called 'Underfell'. He, his brother and several other alternate universes of them appeared in the Undertale Universe due to a 'Multiverse Collision'.

And here is where their story unfolds...