You're Not Half Bad For A Human. (swapfell Sans X Reader)

You are a lone girl with a normal and boring life... You worked at a convinient store just a few blocks away from your not so great House. You were a rather stoic person who didn't care much about the world. You were also a caffeine addict which wasn't so healthy, but you didn't care either way. Anyway, 3-4 years ago...