This is a story of Romeo, who re-birth himself to Charles. As Romeo doesn't want to turn his love life into a tragedy, he decided to be a Charles (which is Cinderella's partner), to escape his reality, that only Romeo and Juliet would die in the end. Romeo and Cinderella doesn't have any connections, finally reaching his ambition to become finally a Charles.
As Cinderella's fun at the ball, Charles needs to apply the same thing. Everything about his ambition would definitely end, if the clock strikes to the right time.