You were in your early 20's,needed a job, you were single so you wanted to work in a asylum, after a while of working there, your boss decided to promote you with better pay, and a one-way trip to the biggest monster they had, Sans, he was pretty large for a skeleton monster, a singular red eye that was located inside his right eye socket, a permanent smile, a physcotic weirdo. Everyone that worked with you died from him, while going into his cell, you found him chained up with a muzzle on his mouth, with a crack on head, barley talks unless he trusts you.