In the original storyline, it was Elliot who left Olivia. What would've happened if it was Olivia who left Elliot?

Tohru Honda has been chosen to dance the White Swan for the upcoming Swan Lake... but in order to dance the White Swan, she has to master the Black Swan. Realizing she doesn't have the dark passion required to portray the Black Swan, the sweet girl the Sohmas and everyone else used to know... disappears... into a world of darkness and recklessness... which could destroy her...