The Lucky Of the Unlucky ones

This is my first story and its a crossover yes but will have no characters from any movies. My own characters and story but same idea from resident evil, 28 day/weeks later, and a little of i am legend who are owned by the people who... own those movies. I placed it a "M" because it is possible that it will be gory and have sexual relationships. please comment and no disrespect. :)