Is it a good story start? Interesting idea or overused?

Sorry but what's with the names. I mean who would ever go by the name of December you should make them civilized enough to come up with names that aren't months also if there all sisters... Not possible it's a 1/100000000 chance that that would happen what you could do ( after you change some names and parts of the plot) is make them all from delegate family's but they count them selves as sisters non blood related sisters